Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb178a9ace17ed6d…

MALICIOUS

PDF

72.7 KB Created: 2021-09-26 22:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a5f1b0a01dd955adf6bfac75e3372f86 SHA-1: 79d0298bca5ee4ff3f6ee9df3152f3f6559d40cf SHA-256: eb178a9ace17ed6d6270dae3e5fdf00fb66781e348bb19699eadd84ab122c3f4
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms or disposable domains. The embedded URLs suggest an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://palazzodiaz.com/userfiles/files/13271424896.pdf
    • http://montpellier-businessplan.fr/mbp/upload/images/images/upload/ckfinder/35757282425.pdf
    • http://iweldbot.com/ckfinder/pho/files/pewupafodifenosim.pdf
    • http://atlonnuri.org/UpLoadImage/editer/files/38073772346.pdf
    • https://thaiwoodengames.com/files/upload/files/24494497017.pdf
    • http://hvpeds.com/upload/contents/file/zivurafufaxosomapofa.pdf
    • https://totalsewa.com/userfiles/file/dajibolamoto.pdf
    • http://internet-trade.cz/UserFiles/file/salomubesesok.pdf
    • http://pro-group.ru/userfiles/file/benibirazijula.pdf
    • https://riolospettacoli.it/filesUploads/file/86744165918.pdf
    • https://rm-parketi.si/uploads/pazonutofosukesijelonipa.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/62bc7dbdedd96f4ef55ddbc48b18a3cc/nusezuzivololomudilu.pdf
    • https://lp-tracking.com/userfiles/file/10439627139.pdf
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/63476392413.pdf
    • http://webminmax.com/userfiles/file/65095862231.pdf
    • http://synphabase.ch/upload/file/gikujeluzedumapujal.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143466a33111---43047245105.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16131cf2f9dcff---beletawesafofepojajobu.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/i3v710ak17j7s2iu727vubkt5l/45982111184.pdf
    • http://qdxqw.com/uploadfile/file/40790429439.pdf
    • https://virtualpulse.eu/UserFiles/file/34928041495.pdf
    • http://salondebellezaanamariaromero.es/ckfinder/userfiles/files/temisexizalijizukoj.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/161344f10eb965---69919942395.pdf
    • http://intproplaw.com/admin/uploads/file/30999344653.pdf
    • https://diphong.com/uploads/zuberexapetel.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=mockup+android+online
    • 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_off0000b907.bin
4350c5eff05a81d18919d81251c1db7a91ecd404a66c335ea4b90cf065f49878
pdf-font-stream PDF embedded font (sfnt) at offset 0xB907 10424 bytes
font_01_sfnt_off0000d0b2.bin
ee10d0596534babe58480c673931ef8c0a08ca4f01b7185fa1fe1f1d965f91c8
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B2 17332 bytes
font_02_sfnt_off0000fcfe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFE 16792 bytes