Malicious PDF — malware analysis report

Static analysis result for SHA-256 037e52e40e7a5b0e…

MALICIOUS

PDF

68.3 KB Created: 2021-02-17 11:40:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d86871f2df95f9d1aaa6f510e6e33f37 SHA-1: 26613a27a85feadfad46e630871e21e460366a8a SHA-256: 037e52e40e7a5b0ebfaa2244d8fb5f98526450a8f1be268442e58bdb69db7e5d
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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/123?utm_term=epson+wf+2630+showing+offline PDF link annotation
    • https://cdn.sqhk.co/vinasujitupe/jeieBGZ/nenirixejot.pdfIn PDF document text
    • http://24goodstore.site/zupevufopigabuxunafeflis5b.pdfIn PDF document text
    • https://lalusaguru.weebly.com/uploads/1/3/4/6/134611329/surisogibexejasepo.pdfIn PDF document text
    • https://napolapivu.weebly.com/uploads/1/3/5/3/135303388/gepof-kakig-feduk-geviromiriv.pdfIn PDF document text
    • https://lobekopaxukibo.weebly.com/uploads/1/3/1/4/131453735/d69eb83e3.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/c8bicjd/soul_knight_wiki_statues.pdfIn PDF document text
    • http://daimontimur.org/19307679209q6jpx.pdfIn PDF document text
    • https://mafenipo.weebly.com/uploads/1/3/4/8/134879688/tusakareb_jegud_xixuzuva.pdfIn PDF document text
    • https://vutuwibomakupir.weebly.com/uploads/1/3/2/7/132740747/kedakana.pdfIn PDF document text
    • https://nebenumepidenok.weebly.com/uploads/1/3/5/3/135307723/8105400.pdfIn PDF document text
    • https://pisaxegeb.weebly.com/uploads/1/3/0/7/130775455/gefowuvekobap.pdfIn PDF document text
    • http://masito.space/812754319319okqh.pdfIn PDF document text
    • https://fitokuzigijot.weebly.com/uploads/1/3/4/6/134681543/6311968.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wumipuxupixak.epizy.com/vande_mataram_lyrics_in_english_free.pdfIn PDF document text
    • http://jogupasowedeni.rf.gd/mopuwalinobewo.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_off0000cde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE4 5496 bytes
SHA-256: 6850fb8b626d39f09fd44e9f1be3041e08f61eed9630f1e0fe11dbdfcb3c6c15
font_01_sfnt_off0000e0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BB 10444 bytes
SHA-256: e7b35af60c9d0b467491e78406d7ecfb85b292bcb6eb610789a3b31a19eb0fb5

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