Malicious PDF — malware analysis report

Static analysis result for SHA-256 becabd2fe483aff0…

MALICIOUS

PDF

75.5 KB Created: 2021-03-20 17:45:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1fe5e1124e106f234ddfbcec5674a9a1 SHA-1: 3f1dd1332ab6360af662cbc71561279025753c98 SHA-256: becabd2fe483aff0827a365efc29b97a8c829d68c915a9c9cac9c9862086c147
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious and contains a large number of external links, suggesting a link farm or phishing attempt. The primary URL, 'https://pelibifir.ru/strik?utm_term=how+to+use+bissell+proheat+powerbrush+carpet+cleaner', is likely part of a phishing campaign. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious intent, potentially leading to further exploitation.

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://pelibifir.ru/strik?utm_term=how+to+use+bissell+proheat+powerbrush+carpet+cleaner PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449998/normal_60537bcf5eb39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369318/normal_602aee96074f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390641/normal_602e720e1c0ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471455/normal_60232e22d4541.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461770/normal_6003d7ed749e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494875/normal_60053ba2956d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388037/normal_5ffde02b161b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412379/normal_5fdd794f0e80f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369774/normal_60303b2716a4c.pdfIn PDF document text
    • https://bufuxilanu.weebly.com/uploads/1/3/4/4/134402831/26093d398.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465007/normal_5fe9d9a0350c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425533/normal_601680f47dc96.pdfIn PDF document text
    • https://tipowunukal.weebly.com/uploads/1/3/4/3/134355136/a3328319.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379369/normal_5ff5097009f29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469828/normal_5fc715dee634b.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/fifuto/energy_australia_rates_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/93933763147.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_off0000e99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99E 5212 bytes
SHA-256: aa53670afc1ecd3deaa9edaf5e891bb9ff6e382a7d33052079c86075b2d18757
font_01_sfnt_off0000fb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5F 10804 bytes
SHA-256: dd4d59590013f2f9d56b8ffdfb761a129f65665b6fc640c60ceb6dc95f4ba121

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