Malicious PDF — malware analysis report

Static analysis result for SHA-256 95d5f01206609cd9…

MALICIOUS

PDF

88.0 KB Created: 2021-06-26 04:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 14278c9acab786bc244108ae65326add SHA-1: 9cc9dfc2aa6dd23938a284caddb2e55be2008eac SHA-256: 95d5f01206609cd9689d8545db1f139ab17055f4b9839390042a8f0cea434d88
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://synerhu.ru/uplcv?utm_term=notability+25+off
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e82dc96b58---vogebijade.pdf
    • http://jkbprivateiti.com/userfiles/file/wifanuxesurajidewofej.pdf
    • https://profipreklady.cz/www/ckfinder/userfiles/files/79315080710.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/d945d895c486037e124bfa8fa2be4a1d/9252326768.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/d932b9826ad719c8335c7e618417211d/tineselesofeg.pdf
    • http://bajajsports.com/userfiles/file/munipemiwi.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16099dce108cb7---reretomudaverel.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3852dc402---janexefiz.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074fdd9bbd19---wusopirazapik.pdf
    • http://gramercy-grand.ru/files/file/24619243084.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/eghbe0nc1ni3ne57d9n1ic3qnm/zipomobawivixogufoloxan.pdf
    • https://repare-ton-smartphone.com/userfiles/file/15161953278.pdf
    • https://ferado.vn/userfiles/file/vekuzidoxujematax.pdf
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d66283de7---roxevasupipinajiler.pdf
    • http://regimhotelierbucuresti.com/images/userfiles/97944146475.pdf
    • http://albertopizzetti.it/userfiles/files/tupiroxekikunu.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9a25344c2---91573486759.pdf
    • https://soechi.com/userfiles/file/rulivu.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4c9b7c5da---63522043150.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160895db5e0e4d---74042503398.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608a14a4b6d3a---43268727490.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/e9d5723a59b81f32e73640b42da1b7bb/87192153671.pdf
    • http://4bx.pl/public/file/25341652990.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/feguxazisinagalojadekeruk.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f58d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF58D 16792 bytes
font_01_sfnt_off00010d9f.bin
9ace5fb0f63116246dfc6a41c04e82b7cafb91f2c4dcf529f399552a5714c05f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9F 17712 bytes
font_02_sfnt_off00013c10.bin
28d780585320460b5139ee2c3ddeacd38e72707b5ed465a0912e20d0f3627797
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C10 10188 bytes