Malicious PDF — malware analysis report

Static analysis result for SHA-256 b09d950249197cf0…

MALICIOUS

PDF

90.9 KB Created: 2021-06-29 08:29:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d4e05f75a8c4583d11e65f346c76093a SHA-1: f0e3d15d5be3d1d8846d60622b634ef49a7d0dbb SHA-256: b09d950249197cf0f932f8c7c22d544fcba362d16f11e1e0e695a45f412edbc0
176 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 WordPress installations or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URI heuristics point towards the use of embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://edwardnugent.com/userfiles/files/82110915912.pdf
    • http://shinies.ru/img/lib/file/zozimebomexidowilodibud.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/da741ceb957ffdbb3c72f9f29d0fe85c/pokiwebobolorojosuga.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16099d8becd55b---65915166461.pdf
    • http://foodsafebox.com/ckfinder/userfiles/files/93010687734.pdf
    • http://barcabianca.eu/upload/file/39544922353.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd830394fa---zekejikirovunig.pdf
    • http://goshaggers.com/clients/2/2c/2ce39afd4341152949bc146f79210d6f/File/luvokusimamobiwar.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb34bc5620---96657641079.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a638119c474---33453432073.pdf
    • http://hghs61.com/clients/9/98/9814c5f28b4e93efd1f74733a9fd6b0f/File/gefevazeliwojuxujonoba.pdf
    • http://gayaarchi.com/userfiles/file/20210620163229.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86fe1d2430---pedafofejobarawaxubonuro.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072cba0151a7---74030757493.pdf
    • http://riccaassociati.eu/userfiles/files/9633127317.pdf
    • http://ashioke.com/images/library/File/87259418745.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818d29bb8b8---fofizezoxuxizeku.pdf
    • http://pospatrans.cz/UserFiles/File/27162070435.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/564f3ed93e7479656228e413fcbcc677/belobazudo.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec62859bde---92728479092.pdf
    • http://ksnjl.com/userfiles/files/50530557390.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/6e37b248a7c55fa5b04c9f5634acbbc1/ranovelukukekizibepiz.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=misfeasance+medical+example
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ead7.bin
bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD7 16252 bytes
font_01_sfnt_off000100b8.bin
29ccb35370ebafec9bd7e6bc49780ee5294851e31bc50fd82aa105f6771fb2ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x100B8 10556 bytes
font_02_sfnt_off000118bc.bin
522ec26115547030ed775df68c161b7bc844b932fc7ffb0f52451ee3c5ae0141
pdf-font-stream PDF embedded font (sfnt) at offset 0x118BC 17464 bytes
font_03_sfnt_off0001460e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1460E 16792 bytes