Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb30123e7b188c1…

MALICIOUS

PDF

91.2 KB Created: 2021-08-09 14:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 82f570297341ac8ef4f646019c1dc215 SHA-1: 6a91228c565a3407868f6de416ba38033e288a7e SHA-256: 9cb30123e7b188c18ef736f97f31861cd851b0986cd12fe31dd657ff34dd8597
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL analysis point to a common tactic of using documents to host redirectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://414movement.com/wp-content/plugins/super-forms/uploads/php/files/428a75da8bae343d65906e5d766c5634/ruvawozexawevijut.pdf In PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb20543e3b---wetisakewudowejewodovite.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/veluninamebejeno.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/hb38ljnd6ign6od4fd4tbv2nt2/32792779011.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/80218670448.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/kivujojopezuvubipajimubuj.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/f991e83f4f27a0516f08081482e21016/98876518926.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea552eaf16---zazekigowogugedavijaxizi.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efdd0048ff---48112912828.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160884e3325eed---jiwaponatavadano.pdfIn PDF document text
    • https://cmoretv.com/userfiles/pakoxovurefijosajisefo.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/84097651467.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/421765819cb1027c3e58f85a51554185/lukiga.pdfIn PDF document text
    • http://remont-elektro.eu/archiv/file/31957866964.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086c7e5ccd58---57857145204.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/714d95433a475b72c6bcc18a6f1d506f/79734411109.pdfIn PDF document text
    • http://www.naraihillgolf.com/admin/userfiles/file/lomojefotuvam.pdfIn PDF document text
    • http://cbcom.eu/ressource/site-image/files/37125817729.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/noxefaduxe.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/2fbbe48c54dee304a06460999ac8484d/7482524200.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072bd621ecdc---dukusufilimefufoz.pdfIn PDF document text
    • https://merydian.pl/nowymerydian/userfiles/file/21679373006.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=rbse+class+10+social+science+notes+in+hindi+2020+pdfPDF 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_off0000f86b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86B 11096 bytes
SHA-256: 0490e8eb6258b08073c3d7eca97b5a50d37afb5af7f195cdc95a3e8419ae769a
font_01_sfnt_off00011205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11205 19080 bytes
SHA-256: 96ca217ff3a2a106d1effab571dbc2d4a00a5cb3bf5bdec48fdeb63e2d739dc8
font_02_sfnt_off000143eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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