Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc6fab73f1d08eeb…

MALICIOUS

PDF

73.1 KB Created: 2021-01-04 03:47:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ae9cfcbccf1563dd3bcf6e2a03235fb7 SHA-1: 9627008ea710c427050042e1ebc0f06fe32258a7 SHA-256: bc6fab73f1d08eebfce8bffec6847a4aaa86b924e4df9fec06cba854686ae4fc
174 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffmen.ru, disguised as a printable Easter bible trivia quiz. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of PRC/3D content and the malicious URL suggest the PDF is designed to exploit vulnerabilities or redirect the user to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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=easter+bible+trivia+questions+and+answers+printable In PDF document text
    • https://cdn.sqhk.co/kafekata/geWPgj6/movies_coming_out_in_october_2020_in_theaters.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496014/normal_5fe869e021822.pdfIn PDF document text
    • https://cdn.sqhk.co/dujujema/cfiijgo/siren_head_sound_effect_roblox_id.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393904/normal_5ff05b796e9f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393893/normal_5f90999119781.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/Xpxiig1/82737838858.pdfIn PDF document text
    • https://cdn.sqhk.co/juxerawabuf/rigNigJ/zemov.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/hkhcgjf/voice_dictation_microsoft_word_2010.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386836/normal_5f915f5a297b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445341/normal_5f9e75ad82b95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5fd2ecf949e52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380086/normal_5fbf00cc19faa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_5fb7b16012237.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/wukara/79826265144.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/dinasipuzaxegafokopega.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/voxujosoman.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/subefowufosimorisabal.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_off0000e018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE018 5328 bytes
SHA-256: e9cf0c4dc6a4fdf71a2fefc9d702ccdcb80e90d9719f12b950d468b0331595a4
font_01_sfnt_off0000f255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF255 10680 bytes
SHA-256: aab3e6c040c3af9acdc7a8b4e251dee200b77e6565f3e7301ad821fe77f36b21

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