Malicious PDF — malware analysis report

Static analysis result for SHA-256 197cef8a2aa9ae4b…

MALICIOUS

PDF

87.0 KB Created: 2020-11-23 08:32:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d0504d0e8d81db3bfdc037aa848d56c5 SHA-1: ed86db6f077137fa612168d65a7386952a351ffb SHA-256: 197cef8a2aa9ae4bb6afcaca3a867451b2338489d5b569efaedd2dcc7dac306a
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains embedded links, one of which, 'https://traffmen.ru/aws?utm_term=geophysics+journal+latex+template', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to a 'Geophysics journal latex template' and implies urgency, aiming to trick the user into clicking the malicious link. The presence of multiple links and disposable hosting suggests a link farm used for distributing malware or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffmen.ru/aws?utm_term=geophysics+journal+latex+template In PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/c119c3e2c1f5f.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/9371271.pdfIn PDF document text
    • https://majizozu.weebly.com/uploads/1/3/4/5/134598595/voreni.pdfIn PDF document text
    • https://mepefukuwipo.weebly.com/uploads/1/3/4/5/134523025/57410c9e878b.pdfIn PDF document text
    • https://rurefidutemajob.weebly.com/uploads/1/3/4/3/134333690/voradosowined-wojanizitu-gatibisolesowe.pdfIn PDF document text
    • https://supixevobaje.weebly.com/uploads/1/3/4/3/134356264/minuxozaritewele.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/2212133.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/10eef6ed-90ae-4f1d-928b-e30f089659b7/fisaroweviki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98a743ea-3c99-483f-8ddc-706ff1386e88/canon_eos_350d_rebel_xt_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40034cc1-d76e-4d12-9a81-d34d5de61557/bovaroluzuzagum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7254641a-4d03-4cba-8fa3-2c3aee206324/73229902345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbc6415f-28ca-401e-863b-2bfaf3829184/kikuwapeguzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98c5c772-b14e-46ce-aa4d-1892a99efd36/88557942970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e8dd1db-dbde-47a2-bcdf-ffb89f5178a5/english_for_everyone.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_off00011444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11444 5448 bytes
SHA-256: 0e9c1ef3588765d804fa5473b3a208ac43c9269a734c0033fc3ed383c86a1c30
font_01_sfnt_off000126bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126BF 11956 bytes
SHA-256: fa705f20a2eabb1dc4f1b1acd6561b518a8858951f816d440c68490af7f120ee

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