Malicious PDF — malware analysis report

Static analysis result for SHA-256 348e6ca9b24b9b44…

MALICIOUS

PDF

97.0 KB Created: 2020-11-25 20:20:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d1e9d93cb61c881b08658607579dc489 SHA-1: f4dd15e0b52d8d349d6a9832021ff62a5431046f SHA-256: 348e6ca9b24b9b440987b416c8f0b6a971bc7b3d8d9e1653ca427310f95ee65e
156 Risk Score

Malware Insights

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

The sample is a PDF file flagged as malicious by multiple heuristics, including a critical PDF link farm detection and an ML classifier. It contains numerous external links, with one pointing to 'https://trafffi.ru/123?utm_term=notes+from+an+exhibition+petroc'. The PDF structure and the presence of embedded links suggest an attempt to redirect users to potentially harmful content, possibly as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=notes+from+an+exhibition+petroc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465564/normal_5faa13db4d34d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370288/normal_5f8906763bb3d.pdfIn PDF document text
    • https://zenefuzivoxog.weebly.com/uploads/1/3/4/1/134108933/tirekedare-xenizobejobo-lisidojavoz.pdfIn PDF document text
    • https://sopulekazixov.weebly.com/uploads/1/3/0/7/130776801/6a8bf003ade76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450632/normal_5fbad92aade56.pdfIn PDF document text
    • https://naruvemekojesez.weebly.com/uploads/1/3/4/6/134685524/2858990.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/gopuze/66002071955.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/anita_baker_angel_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/adjectif_pithte_et_attribut_exercices_cm2.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/30397895180.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/rezetudexiziwigiw.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/fonajolepigumibuj.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/google_chrome_download_apk_download_for_pc.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_off00013e9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E9D 5400 bytes
SHA-256: af6a0ad93bdc037f4935c09ad5128b3e46590cd1a577790b4f38b58b64634b4b
font_01_sfnt_off000150d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150D5 11280 bytes
SHA-256: 4f345b5eaf0e240e555f4e74d4f2baf4fd47613de39382a79adf69703c4eee07

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