Malicious PDF — malware analysis report

Static analysis result for SHA-256 181ab6784cc905e1…

MALICIOUS

PDF

64.7 KB Created: 2020-12-20 21:58:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1936ea0ee94cf1ea4da70fbf29d57cb3 SHA-1: b56074836ac5477cb5e898ddd3e3ece0931b8a09 SHA-256: 181ab6784cc905e1e6979cc6bf90051bf4ee141f3f64c5399ed6f7720d4323a6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains a mass external link farm, with one prominent URL pointing to 'trafficel.ru', suggesting a phishing or scam lure. Although no scripts were explicitly extracted, the PDF structure and heuristics strongly indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/123?utm_term=jet+promo+codes+2020+rblx.land PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415051/normal_5fa2d64e8f0fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450507/normal_5fde6e2d06c69.pdfIn PDF document text
    • https://numeroluxovuz.weebly.com/uploads/1/3/4/7/134733954/23073.pdfIn PDF document text
    • https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/9a3a30d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367640/normal_5f961b35d6e70.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e7ab16c-4e51-4a23-9c12-66ce1a241552/79160578748.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bab2b10-7e91-4fd6-964a-a05954c52f32/21692554267.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/gepamawew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f7b6c67-3f26-4299-b2e7-df4e7e656f2e/59189695134.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/subject_verb_agreement_intermediate_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3482bef6-3673-4cad-bb81-9bb377b04bc2/83138004322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b10669c1-1d95-40f1-a23e-8545721f0bae/namatodajixer.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_off0000be31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE31 5720 bytes
SHA-256: 1fc4c1260738dea9802d8e35ad4c52e8d6565b9814834639c37149c84dad2300
font_01_sfnt_off0000d188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD188 10876 bytes
SHA-256: ffc1b164cc8227cfb03016cf548df6fb02676df0874e00fb773f6f4e33f5068e

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