Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e86d514a0329001…

MALICIOUS

PDF

84.5 KB Created: 2021-07-02 23:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1244de76b85728ff8be27dfbfbc4f178 SHA-1: 0f7fe93c257be4405062fa9bca7a64f549044a96 SHA-256: 9e86d514a032900128db2aa51e870c8da54a87093721178132bf20de9077b8ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest it's designed to lure users to malicious content, likely via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/n7r557motlal5h76np3u94o1kh/98564994952.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/2u2q32vgqd71omk7auvajoeun4/81575756662.pdf
    • http://usaoxin.com/userfiles/2021-5/file/78692741908.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/ce8570df98cee23c298655d739a3b2ce/31942646171.pdf
    • http://shinies.ru/img/lib/file/zozuxivapusuworupirosikon.pdf
    • http://yjccnc.com/upload/files/26519468889.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/d26950fae2f4aeb99e79498332f1d9c4/baforidosopiwewovisiratoz.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f28d3e9678---94005405654.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/d7d016708d85830d00b6a6cd52d4e992/kovakizobubuxivizis.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d2eece861---momovuxuvotadimiriso.pdf
    • https://atesolve.com/ckfinder/userfiles/files/bukovejutalumuvifibisovi.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/bkle190mut4euc36a7d4a95e25/79798806340.pdf
    • https://dienlanhhonganh.com/images/pic/file/kusafokogo.pdf
    • http://westernmaki.com/uploads/files/67279914948.pdf
    • http://langfordfinancialservices.com/userfiles/files/17359171210.pdf
    • http://atek-ent.com/upload/file/kijuzunubemofasorizo.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/k2us8e94rn38esi9d3ojo2co84/93541027056.pdf
    • https://nikosdimos.gr/userfiles/file/nomekebebulubogonota.pdf
    • http://akcjonariusz.com/UserFiles/file/15882818430.pdf
    • https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/faboxefixenixus.pdf
    • http://crosswaysrecruitment.com/userfiles/file/79371996206.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160781e8a11161---99868301548.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b77d1c79c73---kikuf.pdf
    • https://actor-conseil.com/files/file/tukuxakas.pdf
    • https://wemservice.com/ckfinder/userfiles/files/45003590485.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/e6f985f9500634c2de4f64938c4a6b31/pusosakixonigakiru.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=biomolecules+introduction+and+classification
    • 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_off0000e877.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE877 16792 bytes
font_01_sfnt_off0001008e.bin
cef1bba2b507e6a5d0ae6fb8b356ad6b3b95baef5d2bc0cf98a9dee212d03233
pdf-font-stream PDF embedded font (sfnt) at offset 0x1008E 10788 bytes
font_02_sfnt_off00011967.bin
475b8cf4b5f2bc66273350526f4f74fd7071d033558245cdc209176377a60248
pdf-font-stream PDF embedded font (sfnt) at offset 0x11967 16772 bytes