Malicious PDF — malware analysis report

Static analysis result for SHA-256 7973776379c9f96e…

MALICIOUS

PDF

81.9 KB Created: 2021-08-20 21:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7c8b9e55cae0a2cec58c28895a0893e5 SHA-1: 6085017aa7c74df408e284220cf97dc62fbe5e83 SHA-256: 7973776379c9f96ede36b3d61563edb2e1a31c1564da6c79f9ab5d2189fc66c6
232 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised WordPress sites or use IP addresses, indicating a phishing or malware distribution attempt. The presence of a download button lure further supports this. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 10

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://amitadevnani.com/userfiles/file/fixebora.pdf In PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d85601e9c---84347535884.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/4467fa31413b2b7b4d82f9abe9f244d8/15022519949.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cacfd19c8a---zawunuzijosara.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/7c6f5df481ea4b2687c3061b1d3c8838/74292120460.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/xedubu.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/ramilus.pdfPDF link annotation
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/fqpr5btbtfvpcjecsd09ogkhmn/36330397834.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7f3bd4b2a---13417037054.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/7ec91dd9501e5d54d6781de00b022be2/50673044467.pdfIn PDF document text
    • https://eminentland.com/admin/userfiles/files/74261959044.pdfIn PDF document text
    • http://www.logomarcanet.com/userfiles/file/64075210520.pdfIn PDF document text
    • https://ambulatorioveterinariosismondi.eu/file/laritavuwotiboxodov.pdfIn PDF document text
    • https://badoza.net/userfiles/file/52562804955.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0368464001628157313.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609be407ac6ff---70906307169.pdfIn PDF document text
    • https://inverpalmas.site/aym_image/files/93711468978.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/49609511410.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/87833666467.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/7218c0289d370ea221692c64cf9f47ff/61168574430.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16117f18b8c8eb---93024154167.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/fefemoluvaxuvawog.pdfIn PDF document text
    • https://linlinline.biz/js/ckfinder/userfiles/files/13176043845.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/83648974594.pdfIn PDF document text
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/31907225815.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=pba+2k17+apk+free+download+for+androidPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC76 10764 bytes
SHA-256: 189e070848211c59ebafd5886d75ec22b4341fde58c4d782260bd792313c9b3a
font_01_sfnt_off0000f54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5D 16684 bytes
SHA-256: 784e36e8953d38eca86cca089a85230d9e25d28b4f0570c318eebca5784f0dfc

Open this report in the interactive analyzer, or submit your own file for analysis.