Malicious PDF — malware analysis report

Static analysis result for SHA-256 77c80025b6af1077…

MALICIOUS

PDF

105.5 KB Created: 2021-02-28 00:01:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 864652bc5a811ed58d4afb52d7d45449 SHA-1: 16f502c67f63eb395bd7be376b528bc44edc3a6c SHA-256: 77c80025b6af1077516135094f74a6379c55b288af3f9e2609be827f251bc956
96 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware delivery. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. No scripts were extracted, but the presence of external URLs strongly suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://jumiwimov.ru/strik?utm_term=apa+ethics+code+forensic+psychologists
    • http://premial.su/diwol6b8cj.pdf
    • http://namelesssouth.xyz/city_map_project_geometryol4dh.pdf
    • http://kataeta.club/56708868335qhv2r.pdf
    • https://cdn.sqhk.co/gixenerusivu/hhijZhb/26744034419.pdf
    • http://dalkomis.website/acuerdo_de_paz_farcwekka.pdf
    • http://powerpoint4you.ru/starcraft_remastered_download0ef2x.pdf
    • https://vorimebexefup.weebly.com/uploads/1/3/5/9/135960379/a0a69390962.pdf
    • http://reduslimitalia-official.website/265486629580vpfi.pdf
    • http://ecoterritory.store/banuzek2rgsh.pdf
    • http://afracheat6.xyz/razenuroboki76.pdf
    • https://cdn.sqhk.co/bomoxale/ZaMhdvz/time_to_end_it_all_meme.pdf
    • https://cdn.sqhk.co/zopezepazedo/ii3ra6l/94361365839.pdf
    • http://creamwalls.space/54313738871qn8vf.pdf
    • https://cdn.sqhk.co/giwitosak/ic9hbk3/miracle_ear_near_me.pdf
    • https://kenaveduku.weebly.com/uploads/1/3/0/8/130813649/18fc52c.pdf
    • http://ostanni.fun/data_analysis_techniques_in_researchekiqm.pdf
    • http://yozi.store/gunijaxuvexuzegow3py1r.pdf
    • http://cafechorsu.ru/nukuf94ccn.pdf
    • http://totalcreditreport.info/guxozovamalazolabwjyzc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000160a0.bin
c0d8acd94f40b349e48f8d619ae758a9a0aea68db4ca18e7b618b76720b650b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x160A0 5508 bytes
font_01_sfnt_off0001735f.bin
ee2b541da3679e64b1a73b91feeda1ac6fec8086220ea9e6e7d8896b767ce6ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1735F 10900 bytes

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