Malicious PDF — malware analysis report

Static analysis result for SHA-256 297047d65f631000…

MALICIOUS

PDF

81.2 KB Created: 2021-03-25 15:59:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d26430c2457f77b3370b951433ed1709 SHA-1: d4daf2160b0a76321f0ef5de67c09bd148d99791 SHA-256: 297047d65f6310000284236bcfb63423dbd83ee0ad981b57519012541a0359aa
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and likely phishing-related. It contains a large number of external links, suggesting it functions as a link farm to distribute traffic or potentially lead users to malicious sites. The document body is heavily obfuscated and unreadable, but the presence of external URIs and the PDF_SEO_LINK_FARM heuristic strongly indicate a malicious intent to redirect users. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/award?keyword=anthropologie+culturelle+pdf
    • https://cdn.sqhk.co/sopiloroda/fjeghjp/alienware_aurora_r7_mouse_and_keyboard.pdf
    • https://cdn.sqhk.co/devisofage/kxuhfhd/togax.pdf
    • https://cdn.sqhk.co/xazakamugi/fgjhdhe/super_cobra_mustang_for_sale.pdf
    • https://cdn-cms.f-static.net/uploads/4475375/normal_60423e4384efc.pdf
    • https://cdn-cms.f-static.net/uploads/4449777/normal_6023c5f7331a9.pdf
    • https://cdn.sqhk.co/kobewudojuvo/Gvgdbia/sabado_deluxe_online.pdf
    • https://cdn.sqhk.co/pifajaloro/SUECDje/followership_leadership_army.pdf
    • https://cdn-cms.f-static.net/uploads/4408321/normal_600f4ffa90fff.pdf
    • https://cdn-cms.f-static.net/uploads/4490950/normal_604c9c74c95e4.pdf
    • https://cdn.sqhk.co/sifalavuxozo/gcgggdx/zimufuwazijufobolorimema.pdf
    • https://static.s123-cdn-static.com/uploads/4449793/normal_5fc8e1e381fe7.pdf
    • https://cdn-cms.f-static.net/uploads/4470035/normal_6014778ec0e63.pdf
    • https://cdn-cms.f-static.net/uploads/4382793/normal_601cf6f99fe8f.pdf
    • https://cdn.sqhk.co/ruvuwoki/KrcjcR7/boo_a_madea_halloween_2_netflix.pdf
    • https://cdn.sqhk.co/rekosiseweno/aVPerTx/kapepidoju.pdf
    • https://cdn.sqhk.co/zofukumane/Bjjhchg/country_friends_vet_clinic_in_royse_city_tx.pdf
    • https://cdn.sqhk.co/dasofuduveje/dhiaxgh/mofuj.pdf
    • https://cdn-cms.f-static.net/uploads/4427287/normal_5fea20951feec.pdf
    • https://static.s123-cdn-static.com/uploads/4370090/normal_5ff81d8242d58.pdf
    • https://cdn-cms.f-static.net/uploads/4416322/normal_601763a4948ce.pdf
    • https://cdn.sqhk.co/xunijejozi/gMhcheM/75476696047.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_496041b15bfa4767a65ce67309f766fe.pdf?index=true
    • https://30621b86-6952-4b41-80af-4d24d830bc7c.filesusr.com/ugd/122077_d7713a67c2a144429350d7c008084e93.pdf?index=true
    • https://b8436764-02b3-4471-8711-1e8fed235cf0.filesusr.com/ugd/3b3fbb_7e20cb2ae2cc482cb902bf2cd773f140.pdf?index=true
    • https://3dbd840c-7861-42b4-b064-af52d1d2f4eb.filesusr.com/ugd/86319b_d368d09fa80a4a2bb9f8e563bd7240df.pdf?index=true
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbb2.bin
d44ea1d450c494ee1615c6c8dc2473400ba47384aa72f8ee3c3ed7ce948df939		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB2 5020 bytes
font_01_sfnt_off00010cca.bin
a101605f8dabb54a9df47461bcc05bb3a5c7c8add1069bff3da7748886d26df8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCA 13040 bytes

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