Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd288299de4f4a9e…

MALICIOUS

PDF

75.0 KB Created: 2021-06-08 01:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 70691da5655aa06ccc86db3513e8e7e1 SHA-1: 511834225f3e7954374612105a3c2c841dd0cb8d SHA-256: fd288299de4f4a9ed9a1354ad067b5e0494138b7a3ea8dfcd6e11d2a8112688c
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a link farm with numerous external URLs, many hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The embedded URLs and the document's structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://medvor.ru/pbw?utm_term=abbyy+finereader+12+professional+12.1.625+serial+number PDF link annotation
    • https://padotugaladod.weebly.com/uploads/1/3/4/6/134615244/jarijixuwajo_penufajonuwabum_gejogav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421049/normal_5fed972b9f5de.pdfIn PDF document text
    • https://laripevomed.weebly.com/uploads/1/3/4/2/134266376/8703468.pdfIn PDF document text
    • https://larikizog.weebly.com/uploads/1/3/1/0/131071312/ad815a5934b.pdfIn PDF document text
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/d5871e52af5.pdfIn PDF document text
    • https://numuladak.weebly.com/uploads/1/3/4/6/134613837/zuzabaf_kofevonaf_nelaranuvikajo_leduvote.pdfIn PDF document text
    • https://vorujefam.weebly.com/uploads/1/3/4/3/134322124/3b11eb53ef52cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501482/normal_60414217c865e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450148/normal_603d380d86d25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417023/normal_60113a00388d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473049/normal_5fe57af1b4608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_5fe712e60face.pdfIn PDF document text
    • https://zudupati.weebly.com/uploads/1/3/1/8/131856533/fefeganuwixofuli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470035/normal_6014778ec0e63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459470/normal_5fe1eaf5d9eb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476285/normal_602adbeb1581f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446633/normal_6010aae3e2253.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378852/normal_606b572c61952.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411926/normal_5fefedd4d67f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486054/normal_5ff964b040b03.pdfIn PDF document text
    • https://delutezebojuk.weebly.com/uploads/1/3/4/3/134353455/72053e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459165/normal_60217ca5a1425.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470962/normal_603e6fa3d43b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wozixokumo.pbworks.com/f/2858684240.pdfIn PDF document text
    • http://dokajawema.pbworks.com/w/file/fetch/144757659/why_is_my_samsung_tablet_e_not_charging.pdfIn PDF document text
    • http://nagaxop.pbworks.com/w/file/fetch/144609567/19579349597.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE656 5912 bytes
SHA-256: 099c24f1ec6e032426245f2331b865a130b7d508efaeeaf046d663efbbb3af87
font_01_sfnt_off0000fa6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6F 10332 bytes
SHA-256: 3519ce76da6315d3af420ca54ed562236f9f24479c2fddd3979d5b405787a851