Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d604b9927a45fb8…

MALICIOUS

PDF

76.5 KB Created: 2021-01-06 14:11:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 75a4f2dd4a63db7b09cd702b17aae710 SHA-1: d0d1ccd6ddd2ec4822c5c85c57450cb1aa4ce426 SHA-256: 9d604b9927a45fb8b5e09f21fc808929350e08da76b632620bc2cc333e06ba48
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffmen.ru, which is disguised with a search query related to 'divorce for dummies pdf'. This indicates a phishing or social engineering attempt to lure the user to malicious infrastructure. No scripts were extracted, but the presence of a malicious link and the ML classifier's high confidence suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/123?utm_term=divorce+for+dummies+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414342/normal_5fa1f9c15b631.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/73a28569-b2d4-4be9-b3c2-1c8ccdad2c2a/eve_online_quick_isk_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/62267642276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e975faa-cf90-41f3-b7c2-a031cd1b8ab2/46426611769.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/vubavukirudimafax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4f40ba2-d7e8-414c-b5cd-7eb25fac43d6/cooler_master_cosmos_ii_atx_full_tower_case.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/ryder_flip_flops_for_men.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94ad2337-6768-4ff0-aa8f-62d7b3408640/sosepalaxaxamimebob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff094304-c3c0-4f86-86d5-94efeb4a06ef/subigonozanevigudimelaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d09aad1-14d2-4515-8b56-6d1f2fc9356a/15985913756.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/zizuv.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/don_t_doesn_t_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/asus_laptop_atk_package.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_off0000edcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCB 5120 bytes
SHA-256: 6c83c5455f957d4a1f9668ccca05f26d84317bd416e18c5ba19fca44b051940e
font_01_sfnt_off0000ff33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF33 11160 bytes
SHA-256: 2212c76b3fe54a44ab5c787ef22af1b9bafe7de99b5193e86fc4f9d9e09228fe

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