Malicious PDF — malware analysis report

Static analysis result for SHA-256 551fc667ecb60b82…

MALICIOUS

PDF

66.6 KB Created: 2020-12-16 14:51:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 150b8ad1075b7efff05180d273475909 SHA-1: 14503fdef3aa8ed5deaabc817d0e90bd136923d3 SHA-256: 551fc667ecb60b82a8ee479318943277101755d0bf3f77707b5a876a1e9ab8aa
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafftec.ru/123?utm_term=laminate+floor+repair+kit+lowes PDF link annotation
    • https://rujupiben.weebly.com/uploads/1/3/4/8/134852491/dekemazafudo.pdfIn PDF document text
    • https://domilejoxu.weebly.com/uploads/1/3/4/5/134529458/babipowu-monewu.pdfIn PDF document text
    • https://ligexomapaku.weebly.com/uploads/1/3/4/3/134321337/398e434.pdfIn PDF document text
    • https://mavipevawifuduv.weebly.com/uploads/1/3/4/5/134598931/054f621.pdfIn PDF document text
    • https://berizekaxijaj.weebly.com/uploads/1/3/4/5/134501449/rekab.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/zonivezada/beethoven_piano_concerto_4.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/22845577408.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/games_like_football_superstars.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/bobigatelusog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b06dd123-1553-4854-b5a7-321be55e1a1f/zufax.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c3b35bcb0228a29b3dce/t/5fc542b03c6ccf69f30b14a9/1606763186506/vamuw.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/14611187287.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eced4ce-9a8b-411d-91ac-b854d7578964/fixing_run_on_sentences_in_a_paragraph_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/66335801031.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53589df132613bbd9bff0/t/5fc7328309f4d56e8f80905d/1606890124457/pivenijozokoxogebelaf.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_off0000c870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC870 5144 bytes
SHA-256: 2af2c1fe05bfd2b66a9663c590b9f3eca55ccdc5e65edeea43ccea189b9e5337
font_01_sfnt_off0000d9f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F3 10548 bytes
SHA-256: 426c518837d90889191c51879865f1b77d77a147140707217ff400ce9e7a3bb1

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