Malicious PDF — malware analysis report

Static analysis result for SHA-256 80f444e65940f2b6…

MALICIOUS

PDF

67.8 KB Created: 2020-11-18 00:40:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cc82aa0ef8a27c2d80f90b4dd8c53995 SHA-1: 08c5020c4a224064fa0267e85711b016ca70924e SHA-256: 80f444e65940f2b6030cab2abe1e74b41b1e19f0dff34a18dca27f22c559c657
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded links to external websites, identified by the 'PDF_SEO_LINK_FARM' heuristic. The primary URL, 'https://traffnew.ru/strik?utm_term=grafcet+niveau+1', appears to be a gateway to a network of malicious sites. ClamAV detection and ML classification further support its malicious nature, indicating it's likely a phishing or malware distribution lure.

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://traffnew.ru/strik?utm_term=grafcet+niveau+1 PDF link annotation
    • https://zakiguranul.weebly.com/uploads/1/3/4/4/134480990/f140ae2f004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378846/normal_5f8e733663a29.pdfIn PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/genemalagibeso-gazejive-joligupoxaviv.pdfIn PDF document text
    • https://rekenapun.weebly.com/uploads/1/3/4/8/134851377/redojinugizijofomiv.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/3275433726e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388173/normal_5f8d45268d4d0.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/6764384.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/c83d469c-e9ed-48c4-92f1-640a557245df/47103172023.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/bewavatupawoxawegajilakax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/030ef159-4f6c-4f4e-b2ab-8edbd43e540f/14615002771.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/regresso_ao_admirvel_mundo_novo.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/31971541972.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/zotorodogabipap.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/algebra_2_online_textbook.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_off0000c934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC934 4808 bytes
SHA-256: 701861bde2b0b703f61e487be410ce453d08f6fbec84e8a5100ace70d86dc099
font_01_sfnt_off0000d9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B1 12672 bytes
SHA-256: 23eb0a99c7b3b4b9b01ac58c51b4e86497a4c7de3204b408ed81142198bfc833

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