Malicious PDF — malware analysis report

Static analysis result for SHA-256 4572d9a6ac827109…

MALICIOUS

PDF

75.8 KB Created: 2021-02-26 06:29:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2d3ec01ac9a442e104020258c7c4ee66 SHA-1: b29069b397073c4e538d41f4062264f396aa9f49 SHA-256: 4572d9a6ac8271094cf4872574e9ff96fda24cab33bc3e1de4c6daaa9be9068b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are identified as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious or SEO-manipulated content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/wix?keyword=pathfinder+belt+of+physical+perfection PDF link annotation
    • http://golixudib.mypressonline.com/zinedutativutonurobosasuf.pdfIn PDF document text
    • http://witexodegimo.iblogger.org/21291735957.pdfIn PDF document text
    • http://zugapuvu.mywebcommunity.org/chamberlain_universal_remote_genie_intellicode.pdfIn PDF document text
    • https://cdn.sqhk.co/zesuxetirano/ibgjhgE/talking_cat_video_download.pdfIn PDF document text
    • http://form-copyrightservices.com/93836468019f438z.pdfIn PDF document text
    • http://trynon.xyz/97046155163sxf3y.pdfIn PDF document text
    • https://cdn.sqhk.co/vebiziwob/fahdjiB/shelter_island_houses_for_sale.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/final_fantasy_xv_total_gameplay_time.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451028/normal_600b1c625aa5e.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/42330636278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412161/normal_602dcd81c796c.pdfIn PDF document text
    • http://copyrights-notices-helps.com/maths_questions_for_class_4pa66e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://novezepif.rf.gd/nufiluvaguwopofu.pdfIn PDF document text
    • http://fafezevasuba.rf.gd/babul_ki_dua_hai_video_song.pdfIn PDF document text
    • http://sunutexik.epizy.com/jokadubilafu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1A 5272 bytes
SHA-256: 973f068dabc1a497272b95a73477b28ed7f188c6bdadd73ad6e3a226189247a9
font_01_sfnt_off0000eff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF3 10320 bytes
SHA-256: b8644d895cda8b06de2bf4b374aa349c8ac471ff8b4b12017befa13df9ba3992
font_02_sfnt_off00011365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11365 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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