Malicious PDF — malware analysis report

Static analysis result for SHA-256 8604ef7206289afe…

MALICIOUS

PDF

73.6 KB Created: 2020-12-23 10:00:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 89c60ab027fb25b6a20843686d710ba9 SHA-1: 9f19740f15661d0cbf60952de538314c64b5324d SHA-256: 8604ef7206289afe843b7702b6e3f1a9ea63ec449814b0143a1e675ca50ae366
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malicious content delivery attempt. The PDF contains a large number of external links, suggesting a link farm or SEO manipulation tactic, with one prominent URL pointing to 'trafffi.ru'. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links strongly suggest an attempt to redirect users to malicious websites, likely for phishing or malware distribution.

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://trafffi.ru/aws?utm_term=household+chores+app+android PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413978/normal_5fc90ac230eb7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499351/normal_5fce993dc1221.pdfIn PDF document text
    • https://vojufeluwa.weebly.com/uploads/1/3/2/6/132681665/3018511.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471996/normal_5fd9c53249464.pdfIn PDF document text
    • https://fikosaxan.weebly.com/uploads/1/3/4/7/134753192/ece6a3.pdfIn PDF document text
    • https://jedudelovaki.weebly.com/uploads/1/3/4/7/134731231/9607b0512.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://s3.amazonaws.com/besafefaf/23262736951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/144984dc-c905-4ed3-a890-eeda6c8100f8/1721487565.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/2004_cadillac_srx_performance_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd95068a-ba3d-46ba-9263-218778632e04/mercer41_wall_art.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f81fc38-2e9f-44bb-94f5-ee32baf78897/mijiduzimatezuni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebea0a44-a4a8-4457-8977-143358d24fb8/wosefukonovomudu.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_off0000d465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD465 4924 bytes
SHA-256: 08a7313267cb339387bf0c7b3a6d0546bdbddfc888a01b476df4a95168b5e0c1
font_01_sfnt_off0000e504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE504 10916 bytes
SHA-256: 92d8e374db2d94f57e09b9bb0a23bf8f3b1a1841084b98e1d9c0f37cce85e0fc
font_02_sfnt_off00010a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3D 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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