Malicious PDF — malware analysis report

Static analysis result for SHA-256 132dbba2b9c3735e…

MALICIOUS

PDF

106.2 KB Created: 2021-05-25 07:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: fbf157e7b8e4501e7761e9135aab2f10 SHA-1: a21dc235eb8e40a4521c7a79d937a3e8ee6c759d SHA-256: 132dbba2b9c3735e32c5e9526b7f9d5c23a81508a1d3a6d92a52c2a34dff27b2
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly suggest an attempt to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://resalured.ru/strik?utm_term=g+switch+2+armor+games+unblocked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386829/normal_6066ed38abcd3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454425/normal_5fcb7a04004dc.pdfIn PDF document text
    • https://niwurepezexeted.weebly.com/uploads/1/3/5/3/135312419/tajivevulekuxajovuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420244/normal_604cc4b09ac9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448094/normal_5fec495073d8f.pdfIn PDF document text
    • https://jodajapiguzok.weebly.com/uploads/1/3/2/7/132710756/libovijowusideko.pdfIn PDF document text
    • https://javofosuzuvenew.weebly.com/uploads/1/3/4/5/134588543/2397449.pdfIn PDF document text
    • https://wosufixojiniki.weebly.com/uploads/1/3/4/7/134720754/5557141.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448341/normal_60602059ed927.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393502/normal_5ff8bc3371ab6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489839/normal_603fadc819b6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388420/normal_5fd992717f30b.pdfIn PDF document text
    • https://mixuvuweti.weebly.com/uploads/1/3/1/4/131483588/ff12ac5ec2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385887/normal_5ffaaf19698d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369665/normal_6061ff6eb847d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416664/normal_5feff1722e6d9.pdfIn PDF document text
    • https://wadidomewagu.weebly.com/uploads/1/3/2/6/132681938/mevipatirenus_worogutokizediz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419410/normal_600baf8e62f12.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00012b33.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12B33 11224 bytes
SHA-256: 2b62bbfc5fef24fe03cf25740d7c023c24502fbaaae0d6d91fc1fd7bb8cc3739
stream_005_off000176a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x176A1 21360 bytes
SHA-256: 265d4186b5dcbaafaeca6f3bcf67402de8e1a6cb199d19c3c495256ca5a1e2a2
font_00_sfnt_off00011786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11786 5812 bytes
SHA-256: ea8636c07ce1870ac8d4379cc43ef15ec9765f1ef47f1f9411d967be264c666a
font_02_sfnt_off00014ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AB2 12852 bytes
SHA-256: 26895a9f88b99cc8c8be8100ca4b6d9ad523c6ab183dc6125ca775fffccf5032