Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b47f36a83262cb…

MALICIOUS

PDF

99.8 KB Created: 2021-06-26 08:42:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 646407f7fcf91e92927412c4c795a5ec SHA-1: ef1157e5c04bebcca9e287ca816235de3414dfa1 SHA-256: 96b47f36a83262cbef11ff718b6901866b77d44254ba29bcf7ae17f9ed9f5c60
96 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting. The ML classifier strongly indicated maliciousness, and the link farm structure suggests an attempt to lure users to external, potentially malicious content. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • 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://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1ab574465---bewigovesosalaxijafut.pdf
    • https://autotrans911.com/thread/admin/uploads/file/19390150534.pdf
    • http://garderoba.sk/images/_file/73752849432.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/041426a9488dec7aa77b76595a791fd2/59077552636.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5ec660e1a---33472336205.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16081f36fc10b0---xijemosipelanominuwugad.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/a566da870c011ad839fab0ca3fd83dec/19376223689.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/a7a88920369906e2e7ccae68033b47c1/furafipikuv.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/u1fjbead7f0mhc4quh58aqj6p1/rapakozip.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/rv19gqi65lm3laejp6m7je72h2/beperujite.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/ae14766fcfe5418437590d6252ea8ea2/72208345011.pdf
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/44c545ba33f5e65a39ca301cb35f1604/popodorir.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec63406f02---97447340857.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c910b9de1---78289838240.pdf
    • http://aisef.org/uploads/userfiles/file/file/25095280818.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607407ecd0a7b---26910001947.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1659bfc8a---xadosurofatawijeparexifur.pdf
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/40643437701.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099783705d5e---sidanene.pdf
    • http://weberstellen.ch/userfiles/file/20536458234.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/grbtami9pr38bbhfjj26sel696/69153167986.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ede59a9a3b---xugupizamepatumexavurut.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=drugs+used+in+anaphylactic+shock
    • 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_off00012172.bin
17374a82e7653b5edaedcb4c3958fd5c6346f4f447d1f6aeabe1e3d79f6a4218
pdf-font-stream PDF embedded font (sfnt) at offset 0x12172 11100 bytes
font_01_sfnt_off00013b14.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B14 16792 bytes
font_02_sfnt_off00015326.bin
fcaae2ad437cdc3a93524b093126305976d8e230bc1bf811ac516cce6626b2dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x15326 18564 bytes