Malicious PDF — malware analysis report

Static analysis result for SHA-256 9efd149b8eb9251b…

MALICIOUS

PDF

73.5 KB Created: 2020-12-28 16:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8c8745fcc209b5bebcd77f615ce2411 SHA-1: 18967ae639871e70443fe723b438e31c1ab234c3 SHA-256: 9efd149b8eb9251bb17146cad3f7fd736dde70cb193c2b9922c54246698412e6
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffnew.ru/strik?utm_term=among+us+meme+soundboard
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5fd155a273334.pdf
    • https://wunabigoji.weebly.com/uploads/1/3/4/8/134891590/nemos_fuzanixi.pdf
    • https://cdn.sqhk.co/bisadumiza/fuidJgc/30827421415.pdf
    • https://lenatazuponos.weebly.com/uploads/1/3/4/8/134888684/lirofatolenimu-ridovexogugif-vadewubewijofe.pdf
    • https://xazujojupise.weebly.com/uploads/1/3/4/4/134493550/de810e.pdf
    • https://cdn.sqhk.co/latusetime/V6SdZzH/dope_wallpaper_trill_wallpapers.pdf
    • https://static.s123-cdn-static.com/uploads/4421360/normal_5fc45b7d38819.pdf
    • https://mamowolo.weebly.com/uploads/1/3/4/7/134714390/kovifeli.pdf
    • https://static.s123-cdn-static.com/uploads/4385216/normal_5fc810d577049.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/ad42134f-da10-46bb-a44a-cde172deae01/645_area_code.pdf
    • https://s3.amazonaws.com/muwomapotumugi/aqua_barbie_girl_song_320kbps.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d48f.bin
718b391f9e1f456acb2760146471c3a7ede0ab0c18da8ba4fa6dcae391808c17
pdf-font-stream PDF embedded font (sfnt) at offset 0xD48F 4996 bytes
font_01_sfnt_off0000e55d.bin
18532541bafbe5327ccc3fbefaebeead8307959bb64a49bfe6c5742d40059e5e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE55D 11148 bytes
font_02_sfnt_off00010b42.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B42 4324 bytes