Malicious PDF — malware analysis report

Static analysis result for SHA-256 501db17b6e54cb26…

MALICIOUS

PDF

182.6 KB Created: 2021-09-03 21:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 165ac0c69efe6200ec9e3422547b4685 SHA-1: 9ff37f77e72e67177e17ef5f5d679cc97e4f4a13 SHA-256: 501db17b6e54cb26ce5807efd61bfdf6ead569a914ff21dd766c2fc3c661312a
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or trojan delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9789

Heuristics 6

  • 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.
  • 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://queure.ru/uplcv?utm_term=pantera+cowboys+from+hell+guitar+tab+pdf PDF link annotation
    • https://barrierball.cl/ckfinder/userfiles/files/zitilodejad.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/zarakewifebilisures.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/53319239910.pdfIn PDF document text
    • https://sanmuabancongty.vn/images/content/files/budapenejoseke.pdfIn PDF document text
    • http://op-gold.com/ck_image//files/46115665250.pdfIn PDF document text
    • https://realxenon.ru/uploads/files/61241452035.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/fujamelafog.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8f66dcbbf---30658176190.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160787885b15b2---nilefulofekabobekefusav.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608635b9de5a1---82100926098.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/15394647572.pdfIn PDF document text
    • http://starwindows.ie/ckfinder/userfiles/files/134241193.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/55354545082.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/ab7c472d9c98972cf40cbb7bd4e5d1af/4159237181.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f6981bf88---38611874876.pdfIn PDF document text
    • https://nibrasimansch.com/userfiles/files/nosogopekupo.pdfIn PDF document text
    • http://cbcom.fr/ressource/site-image/files/2719439662.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608402d6e03da---74467345163.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/50f953e04d1f380d999defbca17a5d64/sokunudeweg.pdfIn PDF document text
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/38191916680.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/48229560785.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/hd9pqjes4t4ee9qani621htoq7/15664463847.pdfIn PDF document text
    • http://oishisushigd.com/uploads/files/kukasujurinevus.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beccf258084---dubidewiz.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/68223560910.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/jr0tjdo3qj5893c0mn9c8lvf4k/wubatam.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_off00026243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26243 11508 bytes
SHA-256: d593721caad02704ce4fbfe602ae36ea772c2f59f04c6d1597a324a626c8d553
font_01_sfnt_off00027cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27CFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002950e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2950E 20960 bytes
SHA-256: c85792ee97bb8cff1e0a90a4bbab352bf24c0902792a34dcddc0d526adf60e32

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