Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a80a3ba01de0b39…

MALICIOUS

PDF

87.0 KB Created: 2021-08-01 09:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b98247f6bb6491209e6af4dfa4142605 SHA-1: 5018fffd671180a78104e7f3ea1d58a1d681d5c1 SHA-256: 0a80a3ba01de0b39c5c833c34940a5cb6c1878febe36753d1c9d7277c8e351a2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/a10a3de2919ff84764be179561c53670/kodusisilojupibo.pdf In PDF document text
    • https://amrapalispot.com/userfiles/file/kevewezoruwe.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/55623661411.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/25344273839.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084692babe9b---rarivilokupavoreman.pdfIn PDF document text
    • https://birudongker.com/contents//files/14070346254.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/17218701363.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bae809d9268---12497602106.pdfIn PDF document text
    • https://fereshtegan.net/basefile/fereshtegannet/files/15907068415.pdfIn PDF document text
    • http://xn--80aesyq.xn--p1acf/files/file/darovagoko.pdfIn PDF document text
    • https://loyallcanada.ca/editor_files/file/kevopojoxevuguxipefovuj.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/d2a3b4f504b60a8748716e76ae5f0b6d/xutazidufuge.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c52b395bc---65122349499.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c33bf3c7296---jexopujozatemurakilujani.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bd35816e81e---kipezugode.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/832312910.pdfIn PDF document text
    • https://hopadive.cz/ckfinder/userfiles/files/91155237833.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/6046b79574f430f192fc02692fb9afdb/61439121926.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/foporefibidepalawusebo.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/wanerolonerep.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/91509eb651f8833ea20ec85a788d4c71/55291954936.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/38993633654.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/4e6d04a871363e870162218bb605abe9/delipobunot.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/ridopuzazimusumokokorosu.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/wepinijaverajewojiso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=loan+repayment+document+templatePDF 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_off0000f0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CF 10588 bytes
SHA-256: 8e04571d50196caa8e258e425eaa7895436d5850ace2000eaae19003f6314570
font_01_sfnt_off000108f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F7 17300 bytes
SHA-256: 88c34e935c22483d1b71f2044f6417f87e1f06473e136abdc746fbe62eb06cd1
font_02_sfnt_off0001362a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1362A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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