Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc63bddac4be974…

MALICIOUS

PDF

58.6 KB Created: 2021-02-20 17:28:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 8c369fda56157e65c805690c1cfcc4f8 SHA-1: 530df27b9a7f262f2f7a234f3c9ef9ab2791821c SHA-256: ecc63bddac4be9742d9479ce05d963dd773325f0c1c7836e9e203a36de1740f4
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8068

Heuristics 4

  • 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 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
  • 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://jacksth.ru/aws?utm_term=research+topics+in+algebraic+topology PDF link annotation
    • https://nexudusuje.weebly.com/uploads/1/3/0/7/130740550/ed388ff.pdfIn PDF document text
    • https://karimimeri.weebly.com/uploads/1/3/1/1/131164281/ropudosisupiwuw.pdfIn PDF document text
    • https://xuxijirabof.weebly.com/uploads/1/3/1/4/131406659/7860690.pdfIn PDF document text
    • https://zovezeko.weebly.com/uploads/1/3/4/6/134697242/5270832.pdfIn PDF document text
    • https://semukozev.weebly.com/uploads/1/3/4/4/134493414/8327562.pdfIn PDF document text
    • http://xigosilefonaboj.iblogger.org/49189488897.pdfIn PDF document text
    • https://tixonanixob.weebly.com/uploads/1/3/4/8/134890866/28ec1bee384d7.pdfIn PDF document text
    • https://fedalovojuxunod.weebly.com/uploads/1/3/0/7/130775560/0e65098f52d4fd.pdfIn PDF document text
    • https://midejewafefo.weebly.com/uploads/1/3/4/0/134000268/4eb923176.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/simharasi_rajashekar_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/capsim_situational_analysis_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/69622439971.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/rumble_fish_chapter_10_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/bluestacks_windows_7_pc.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D8 5444 bytes
SHA-256: 09583533bafbcb9e0cb3984e37b35e5a4d5327c6d755a54b17cc50f7f97f7519

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