Malicious PDF — malware analysis report

Static analysis result for SHA-256 24177b7d4870c194…

MALICIOUS

PDF

62.7 KB Created: 2020-12-20 21:54:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c8704a5b85980bb71cd7ee86871ce87e SHA-1: e44f17325be53f8a428223850ebea2837737f403 SHA-256: 24177b7d4870c194aee72325beb3fcf3ba8a1a42ac95c613b6ef203fed32aea4
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, particularly the one to 'trafffe.ru', suggests a phishing or link-farming operation. ClamAV also detected it as Pdf.Phishing.Trojan, reinforcing the malicious classification.

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://trafffe.ru/123?utm_term=rotella+t6+5w40+specs PDF link annotation
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/8807852.pdfIn PDF document text
    • https://luwujapi.weebly.com/uploads/1/3/4/7/134751522/roferudozig.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/313668.pdfIn PDF document text
    • https://fexogobavube.weebly.com/uploads/1/3/4/6/134639764/3917232.pdfIn PDF document text
    • https://detaliwaka.weebly.com/uploads/1/3/4/3/134340587/taxitagowesipoluzu.pdfIn PDF document text
    • https://bexoligimes.weebly.com/uploads/1/3/4/3/134314561/7894398.pdfIn PDF document text
    • https://bafizotadax.weebly.com/uploads/1/3/4/7/134761596/574a84710825a84.pdfIn PDF document text
    • https://zazivepug.weebly.com/uploads/1/3/4/3/134359823/83b5f85e9e7f496.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/5fdc7d305fcdb718a17c69c1/t/5fdd044467c3114891d62eb1/1608320068759/todebugaberobalude.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11a4c405d5340f32abf29/t/5fc65bb1f3de5e49b53e7681/1606835124097/tamil_love_ringtones_2019_download_in_isaimini.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fde9718c66bff209e816f84/t/5fdebedc2baf317dc39c0f03/1608433373887/avengers_2d_game_for_android_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcff0a8bc8713fe6fe1d80/1606221579434/chemical_bonds_word_search_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9ec4965-bfe7-49de-ab13-0820f9401e7c/53842994243.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64a29e2fce462bcb0a474/t/5fd66ee6481cfa31adc9aaba/1607888619099/xesobejoligom.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_off0000b9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9EC 5440 bytes
SHA-256: 9b226fe8564a484088a591df6ed280f05f4ac0f958642b9e89dd4a36bdfbbd16
font_01_sfnt_off0000cc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9F 9836 bytes
SHA-256: fe3ab70d730e954ba528681a4e0078bd7f580e408b324efa99f47befc18c24f9

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