Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c710d0ea8827808…

MALICIOUS

PDF

74.3 KB Created: 2021-01-05 22:00:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 67afa36d0eedb0671bc20bb7fc6c3932 SHA-1: 632a8f1a4bc12e9bc45cde528e15a7ec3861b72d SHA-256: 3c710d0ea8827808c1ce3422b998d7670e7f4e995d1becaf3b8a40cb2935cb63
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'traffmen.ru', which is also listed as an IOC. The document body, though heavily obfuscated, contains text related to 'Dell laptop certification test answers', suggesting a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=dell+laptop+certification+test+answers In PDF document text
    • https://cdn.sqhk.co/vowibesep/CAgg5bd/quiz_do_clash_royale.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/hdMKjc8/nadejogodopogakagivog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446029/normal_5fde1f448eb60.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/IAuFhdP/photo_editor_pro_app_download_for_mobile.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416510/normal_5f9f8bbae778d.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/a227d7ef-cccd-43d0-a6e4-b13076270adf/megubenejoxinukelefebos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/756deb35-37ef-4505-9e45-366e3f6d9034/bobcat_843_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/coroners_reports_public_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9730db0c-4b75-4c3c-bc65-e6ac6d0616f4/dozed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e04047-e153-400b-bd43-86457d4c6195/viwugoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47befe3b-50a1-463c-bde6-7cebfe3ce2a5/burek_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/download_windows_loader_2.2.2_rar.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_off0000e63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63B 5100 bytes
SHA-256: fc05607498c4290f03beea326dd443d620c6d81f298e969524a0244de20a5753
font_01_sfnt_off0000f7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BB 10636 bytes
SHA-256: 1ba824ed69f9a1848a6a517b5dc59d1e6e12787200cc45ec5b9e0beea7c5ac35

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