Malicious PDF — malware analysis report

Static analysis result for SHA-256 293abb382646c736…

MALICIOUS

PDF

73.6 KB Created: 2021-05-12 11:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17a0013d6ed2025efbdb63f73758ccb0 SHA-1: 250fccd503eddb5433b4794e71cf4e337edf3b72 SHA-256: 293abb382646c736f9c25dcd682987c12b692a1b5939a9126939815fc94a75c0
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, identified as a link farm, with one prominent URL related to a search query about electricity. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=who+discovered+electricity+in+lightning
    • https://lifalaril.weebly.com/uploads/1/3/4/8/134883644/1759628.pdf
    • https://cdn.sqhk.co/jegamaxegev/hiegdzj/kavizikofijivodisadumubun.pdf
    • https://cdn.sqhk.co/dafibuxoki/1jbliaO/real_air_force_1_white.pdf
    • https://cdn.sqhk.co/soribivevi/VlichjU/4104521788.pdf
    • https://cdn.sqhk.co/bulixanejad/XhiBZtu/w3schools_js_quiz_answers.pdf
    • http://lovelyhouse.online/5563524114x212u.pdf
    • https://cdn.sqhk.co/norowitidot/jjbhghg/gaming_4k_wallpaper_for_pc_1920x1080.pdf
    • https://ledijonag.weebly.com/uploads/1/3/4/6/134689342/legawifet.pdf
    • https://cdn.sqhk.co/xenivoronizu/heODRH4/lovely_love_ballads.pdf
    • http://fullcreditreport.info/budexidocj0yb.pdf
    • https://cdn.sqhk.co/rawatajizefu/cgdhe4O/hints_for_adopt_me_modern_house.pdf
    • http://ig-copyrighthelpcenter.com/zemoxescabqm.pdf
    • https://cdn.sqhk.co/mogudekusab/eihhggc/99860570412.pdf
    • https://pedasivu.weebly.com/uploads/1/3/5/3/135387907/butikunigafapekumaj.pdf
    • http://usene.xyz/zuwumirowujud8elh.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f004e983-f8b3-43d2-96c5-8e683690925b/37739101703.pdf
    • https://uploads.strikinglycdn.com/files/6691364c-de66-46cc-936a-3b315ce6bbde/ejercicios_resueltos_matematicas_3_eso_estadistica.pdf
    • https://uploads.strikinglycdn.com/files/1b5fed1a-feef-463a-b9e0-b52aaf3020d7/zoken.pdf
    • https://uploads.strikinglycdn.com/files/439f32ba-c533-4ba4-83af-b8d75e0edd52/11115974381.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e161.bin
f16a94ce8b14d878de23e570f21529a0a67e4010c4339db3e41ff19f0508d080		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE161 5164 bytes
font_01_sfnt_off0000f30b.bin
26178bf178eeef7838e794e6c7a7fe48f43c871b7bfea5fecb7316ce059f5ce1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF30B 11424 bytes

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