Malicious PDF — malware analysis report

Static analysis result for SHA-256 b694148f2d332dc6…

MALICIOUS

PDF

96.0 KB Created: 2021-08-17 08:26:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1b1c7ce5ac885908de72248a60230fea SHA-1: a1ef64952ee437b2f53a472051611bc08a4433fb SHA-256: b694148f2d332dc613a59550a0f209de342c874c13acfb6fdd6aad831098f789
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The file contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2855258c5f---51045315165.pdf
    • http://iamsong.vn/uploads/files/20100373617.pdf
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/3325635227.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/303be7311f5b86e18070c6ed110ba8c0/29976536520.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c78922d6f3c---47631702848.pdf
    • https://karapinarinsaat.net/userfiles/upload/file/4792250434.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c88c6ac7770---guxal.pdf
    • http://fygl.net/uploads/file/021909506512.pdf
    • https://aashianarealty.com/file/vumalasitofudoxumewe.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b81fb537e5c---tibaloxerakize.pdf
    • http://fmi.lu/userfiles/files/fajunufutebi.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/68c34cadd956ccefea7f5a9d9f3c04ef/62448832723.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c45bc57575---muvovu.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/16ff11e353eef3b1863a2ace4a7f3d50/90653158477.pdf
    • http://obchodsezlatem.cz/upload/files/pekexibozozixevawitada.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/af62747ce6946961634740af971091f2/bavirerudobakirevawagexi.pdf
    • https://digireg.org/upload/34723569138.pdf
    • http://apluskleaning.com/admin/images/file/vowuwogejeninifopon.pdf
    • http://iccj.jp/images/uploads/fckeditor/file/mizasezakevefalexajose.pdf
    • http://goteneplast.se/files/images/file/mekujivita.pdf
    • http://dichvutheapec.com/upload/FCK/file/wugudazatofube.pdf
    • https://wisserarm.nl/app/webroot/files/userfiles/files/75875579409.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c87e31e91d6---35365098170.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=papa%27s+pizzeria+to+go+apk+free+download
    • 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_off00010d26.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D26 16792 bytes
font_01_sfnt_off0001253d.bin
461aa7130f28e7cdf2d7fd4a0f98bb56290595de4b38dd18cc6815875d6fd648
pdf-font-stream PDF embedded font (sfnt) at offset 0x1253D 10948 bytes
font_02_sfnt_off00013eb6.bin
e0dbdf4ffcca6f784e3ab3a29d9e83188da66e526c987202c8622ea0e69bdb84
pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB6 20076 bytes