Malicious PDF — malware analysis report

Static analysis result for SHA-256 70299bb8cdb79b6f…

MALICIOUS

PDF

59.1 KB Created: 2020-11-26 02:12:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7de035155c1e88c683f71415018a1668 SHA-1: 189cd70b9edf466d25fcfbe6b834811c97ef3470 SHA-256: 70299bb8cdb79b6faf373f5b710513facd38713c32b8619f1fe0002572caf3d0
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm or phishing lure. The document contains numerous external links, including one to 'trafffe.ru', suggesting an attempt to redirect users to malicious or spam content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate a deliberate effort to create a network of linked documents, likely for SEO manipulation or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/strik?utm_term=that%2527s+a+bold+strategy+cotton+gif+imgur PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417995/normal_5fb8016e9f93b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410985/normal_5faaf795ccd9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453907/normal_5fbeda210e54b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373999/normal_5f8d98d01d1aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426418/normal_5f9be2643dd91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413238/normal_5f9f2e712616b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369166/normal_5f8e864f586d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402533/normal_5f9b86e424c2d.pdfIn PDF document text
    • https://sagelaxun.weebly.com/uploads/1/3/4/5/134594749/154ae9d67d6eda.pdfIn PDF document text
    • https://toxovapuwelubu.weebly.com/uploads/1/3/4/7/134733969/1fedea2218b.pdfIn PDF document text
    • https://jivixetikuzi.weebly.com/uploads/1/3/4/7/134745571/2974b.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/e850990e.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/1671399d-c0f4-4a1c-8a04-699b58c954eb/27851636431.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_off0000abf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABF3 5660 bytes
SHA-256: 1845b4238fc7e1ff3e4d552316f2f1e98996b664d423aa20c5fad1d85db011c7
font_01_sfnt_off0000bf16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF16 9520 bytes
SHA-256: be655765ea81279e19fdccf8338b64551e34299b46a787fa6892eee23f75a09e

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