Malicious PDF — malware analysis report

Static analysis result for SHA-256 856cf3bc588188e7…

MALICIOUS

PDF

70.9 KB Created: 2020-12-22 04:41:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e268d0937e7aeb8c320b9df1b0588454 SHA-1: cc95ee24580fb29e599aa464af251b4f15ca6d6c SHA-256: 856cf3bc588188e702086b0c52c425fd74c2b7c5268537a6475662443820c316
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The primary malicious URL identified is traffking.ru, which is likely used to host phishing content or further malware. ClamAV also detected this as 'Pdf.Phishing.Trojan'. The presence of embedded links suggests an attempt to redirect users to malicious sites, aligning with phishing or SEO spam tactics.

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 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.
  • 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://traffking.ru/123?utm_term=blue+eyes+song+frank+sinatra PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379030/normal_5f904a9064abf.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/282cfc39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369328/normal_5fdae1cd15836.pdfIn PDF document text
    • https://xataramev.weebly.com/uploads/1/3/4/3/134320843/tapalisizemef.pdfIn PDF document text
    • https://xufujume.weebly.com/uploads/1/3/4/8/134851049/725188.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378605/normal_5fc967f37ba9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_5f8e0c4ab2429.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7abba892-7743-4193-be33-ea50568fc047/mexitujumetapukejoz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc15fabe2fce462bc8f3d9c/t/5fc6bf285fecd2174b47589e/1606860585279/60228163642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fdff051-1c0d-4ec0-8fae-f2e69ddc464a/casio_wave_ceptor_instructions_4723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74fb41ae-854a-46c6-b856-c6ba16926b9c/50933089020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3566103-ce43-4de8-8d7b-41ad01ef0637/sajjan_singh_rangroot_netflix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7ab1ded-259d-47c9-bac4-d0b52789d819/matugamesiwenikaruvon.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe12d71b3a45d4e1c37cccc/t/5fe13378669ddd5531a13ed6/1608594299034/93141704109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9192c338-9151-4ce4-9996-d5c347105629/academic_strengths_examples_iep.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC10 5032 bytes
SHA-256: ed8f7c56c35353dab8065c25a3a7ae42379b1c26a52145ae62b7df36921ca119
font_01_sfnt_off0000dd4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4E 10268 bytes
SHA-256: b261a2a277a90f3b804b8193698b4771b3c1aa878c5ce4413c2d80cc0204a25c
font_02_sfnt_off0001006e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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