Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a19711087aebb72…

MALICIOUS

PDF

71.2 KB Created: 2020-12-22 23:06:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0fa80e136a17e4b1aee4dec38deafe77 SHA-1: 003636287c48308b051c83659ca2cd90e103e405 SHA-256: 5a19711087aebb720f44f9b31ee31efe4a5ca36d67729a0bfe2eadcd4937cd09
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. The document body, though heavily obfuscated, contains references to 'Death race timeline' and is associated with a link farm hosted on disposable domains, indicating a phishing or scam attempt. The embedded URL 'https://traffnew.ru/strik?utm_term=death+race+timeline' is likely the final destination for the malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://traffnew.ru/strik?utm_term=death+race+timeline PDF link annotation
    • https://vawuzusafut.weebly.com/uploads/1/3/4/8/134863851/7a6ed3.pdfIn PDF document text
    • https://tebefatudu.weebly.com/uploads/1/3/4/3/134329870/fe42a2d.pdfIn PDF document text
    • https://fixubosadad.weebly.com/uploads/1/3/4/6/134658154/titinog-vuvalopugozideb-verazawu-jenelikale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416666/normal_5fd7a6a551360.pdfIn PDF document text
    • https://kerumesuni.weebly.com/uploads/1/3/4/1/134131613/lemajiru_nidisex_bumuxajos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378390/normal_5f984092e0e93.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fdcb8151ac7e22a65153ef0/t/5fdd0063fbf738146299ac2c/1608319075893/67059327584.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/baeyer_villiger_rearrangement.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/zawupibawofoniwix.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/62196765527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70370ecc-60b2-4bc8-8aad-294df0000b83/tinkers_arrow_shaft.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/lymphadenitis_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/88327206455.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc00a03c6229360eca839ab/t/5fc0e948e18c5c478e1d3038/1606478153662/45327201600.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/worksheet_displacement_time_graph.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_off0000dae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE6 4860 bytes
SHA-256: 5bc9d9b6cbed5394fbe07be18ded2531c1c65a20603c493793c6de39d46d9fab
font_01_sfnt_off0000eb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB46 10744 bytes
SHA-256: 6ca72e15dc41088f7973b35cb1100e6fde71217bbdaa7951aa02edff5e5fd997

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