Malicious PDF — malware analysis report

Static analysis result for SHA-256 40bab64b4fb25c1a…

MALICIOUS

PDF

83.5 KB Created: 2021-05-28 01:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 594387ca2e2923955f745cbd511d5685 SHA-1: 94a3f8a336e54923e3f7c5768a28e1d9a93ce0b5 SHA-256: 40bab64b4fb25c1ab83c6657beaf468d3fab1449839c45ea115f09b335968c32
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The primary URL, 'https://lozipotod.ru/strik?utm_term=cu%25C3%25A1nto+es+300+gramos+en+tazas', is suspicious and likely leads to malicious content or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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.
  • 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://lozipotod.ru/strik?utm_term=cu%25C3%25A1nto+es+300+gramos+en+tazas PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383806/normal_5ff54648b66e6.pdfIn PDF document text
    • https://jomezafivawig.weebly.com/uploads/1/3/1/8/131856232/7412566.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475564/normal_5fd050163d783.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465548/normal_5fc5ea7858568.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417321/normal_606e58fca5ede.pdfIn PDF document text
    • https://nijawefevijabit.weebly.com/uploads/1/3/4/6/134665626/aae93eefd486064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5fe80ac72d5cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369926/normal_603eed7ecb556.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368242/normal_5ff491dc0d7b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388060/normal_60236459c42e7.pdfIn PDF document text
    • https://zobatovegu.weebly.com/uploads/1/3/0/8/130873738/xutupet-jomisor-wafulikulefef.pdfIn PDF document text
    • https://tebokefabizanil.weebly.com/uploads/1/3/4/8/134866802/8589670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381082/normal_604332c08405d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380525/normal_5fd885552e845.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4455185/normal_60b00ce9ae77e.pdfIn PDF document text
    • https://gufagopa.weebly.com/uploads/1/3/4/6/134660265/7f83b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474723/normal_5fece99596c03.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/17f00796-3fd5-4f00-97ba-10fe9357ab8e/how_to_be_coca_cola_distributor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf0ada16-a130-45b7-a8d7-a640b099f34f/50788832543.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a68fd2d6-a8bf-4f12-a522-19459b22addd/46247058985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1786b585-9968-4169-a6e8-faa2093d0372/john_deere_gator_hpx_cab_enclosure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11dec3d6-00a5-44aa-9ada-52fbe488636d/soralorexutuxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfebdf52-403d-4ec7-bb56-d0189f78cfff/why_discipline_is_freedom.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE241 5468 bytes
SHA-256: 796c0712482673e83e6b36dcf6c3e49e1eb1a19dcd3c6c6a0f99639386ea34ec
font_01_sfnt_off0000f431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF431 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000fcbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBF 13748 bytes
SHA-256: 8d36455182e259a0f6e5b052a220a6cad264521ac6338c4c7d465cf4558b5800
font_03_sfnt_off00012745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12745 16644 bytes
SHA-256: 09251192a6d37cde3ad87d3edcffff2389d4deff7df9e0e1e1e4bd078e0969c9