Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0cd27dac08770c5…

MALICIOUS

PDF

83.0 KB Created: 2021-09-22 19:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a242d8c84e05a5b4a8798e5f951735d7 SHA-1: 6820b1d9a6449f813f0aacb6714a0e7039a9c02d SHA-256: d0cd27dac08770c597b74f1959bd77acf56650e0ac644b369b95c522d5b5cbed
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a 'download button' lure and numerous embedded URLs, many of which point to potentially compromised WordPress sites or disposable hosting, suggesting an attempt to trick the user into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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 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.
  • 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://philabc.ru/uplcv?utm_term=dj+remix+apk+download+for+pc PDF link annotation
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132f9ca252fb---65958990901.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/18072673907.pdfIn PDF document text
    • http://npas.ru/pic/file/lunofusa.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/basowiwifomazabimuwuko.pdfIn PDF document text
    • http://bbhshipyard.com/userfiles/file/56432327408.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/rinorapa.pdfIn PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/duzog.pdfIn PDF document text
    • http://trips-in.com/ckupload/files/50825457312.pdfIn PDF document text
    • https://forumsevens.com/images/file/26277484636.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/c8b757thcmi8i4ml69na22h173/piferexetenoke.pdfIn PDF document text
    • http://naturenhuman.com/app/webroot/userfiles/file/18687480874.pdfIn PDF document text
    • https://reha.bg/content/upload/file/wapajajuzupemebogeleso.pdfIn PDF document text
    • http://henskeschildersbedrijf.nl/upload/vafobekikuni.pdfIn PDF document text
    • http://123podkrovie.sk/editor_uploads/files/68336950203.pdfIn PDF document text
    • http://korvet-sp.ru/userfiles/file/93475760388.pdfIn PDF document text
    • https://drisraadentalcenter.com/userfiles/file/4854106635.pdfIn PDF document text
    • http://sluchatka-shop.cz/files/upload/files/90786263328.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/bomipuzakisorala.pdfIn PDF document text
    • http://tianlanip.com/filespath/files/20210907124535.pdfIn PDF document text
    • http://immobilieninvestors.net/userfiles/file/vabaxasoxoluvosezoju.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613175744cbc6---87358970670.pdfIn PDF document text
    • http://altadirezione-consulting.it/userfiles/files/81451192796.pdfIn PDF document text
    • http://propertiesforrent.com/userfiles/file///bamagemoru.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc27be8748---52591724490.pdfIn PDF document text
    • 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_off0000dda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA4 10924 bytes
SHA-256: 9b51da3600deaea52701a7a7d88c2df360c2a875ee4409d95c6b6b102c7cbaff
font_01_sfnt_off0000f6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F04 18020 bytes
SHA-256: d48086701d49616cfeaa54d1de73c182e4365a9731de06b1864b87fb1facdaaf

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