Malicious PDF — malware analysis report

Static analysis result for SHA-256 02bcaba5003f6ce2…

MALICIOUS

PDF

60.7 KB Created: 2020-11-29 05:22:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: beb7004e4cc5c35df4c145db0da9f51c SHA-1: 1d5065ac185b96fcc3f6c575efcd0c5590388795 SHA-256: 02bcaba5003f6ce286f553a7405b79ebdefadacdd7044ae900d47902fd7f166e
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a link farm and a payment redirection lure. The ML classifier and ClamAV detection strongly suggest this is a malicious PDF. The embedded URLs, particularly 'trafffe.ru', are likely part of a phishing or scam campaign designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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/123?utm_term=go+smart+mobile+number PDF link annotation
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/viwaz.pdfIn PDF document text
    • https://gulemexaw.weebly.com/uploads/1/3/4/3/134360266/saseduzum-gabulutotabip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425005/normal_5f9e3125bee4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469103/normal_5fbe1e6fbba5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382780/normal_5f93f6f5e471f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419205/normal_5fa054cb7d583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443809/normal_5fa6dfb6c8278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377112/normal_5f92c3b154bb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421342/normal_5f98da399f103.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465687/normal_5fba9557e1ad8.pdfIn PDF document text
    • https://wugaxaxelapuwu.weebly.com/uploads/1/3/4/5/134595152/dadiwusududilo-zujixi-pedamitetufifod-lusazaz.pdfIn PDF document text
    • https://dujenavu.weebly.com/uploads/1/3/4/3/134366251/9136197.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/dudurat/bullseye_target.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/admission_form_for_college.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_off0000b2bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2BC 5004 bytes
SHA-256: 7df3b31fb4ebd55810f666799331ecc9f63f32e54a0ecafcc1b4081554d6ecb1
font_01_sfnt_off0000c3a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A4 10104 bytes
SHA-256: 19164a3c3bd7aeb98fd9b88cb4b87d2ac86042691d923dca1a25189a172b0537

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