Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd24775173a7a27…

MALICIOUS

PDF

67.2 KB Created: 2021-02-24 19:03:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d0d433e24da491aaa8d596c3f9046d6b SHA-1: 08f116f6a194b7fe8e157b0531203ce6d9cfd128 SHA-256: 9fd24775173a7a27ef69db6e79fabbaeabee06009d69e9bdf4a28ee7f6193ebc
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://yafferge.ru/wix?keyword=ib+biology+model+answers+pdf In PDF document text
    • https://sowekunozo.weebly.com/uploads/1/3/5/3/135321923/kodajona_pisosipediru_kegejevibunal_siwubemevibam.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/CheigRL/konoboxemavupuvuxe.pdfIn PDF document text
    • https://cdn.sqhk.co/naxiwakiwuv/9hhggia/falling_waters_wv_things_to_do.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417314/normal_5fdef7d6a7da1.pdfIn PDF document text
    • http://wigomufeze.22web.org/rift_best_skills_for_cleric.pdfIn PDF document text
    • https://cdn.sqhk.co/pebekaja/lhgSGjg/anime_paint_by_numbers_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/desiruzag/xGfgi1l/zombieland_saga_sakura_death.pdfIn PDF document text
    • http://pozesex.iblogger.org/nuluwavorunubus.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/jgi8imM/europe_empire_2027_money_hack.pdfIn PDF document text
    • http://zamividiwido.22web.org/76045985816.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bogepep.rf.gd/earth_s_amazing_atmosphere_worksheet_answers.pdfIn PDF document text
    • http://vimitafukufes.rf.gd/8000682692.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/whatsapp_voice_call_free.pdfIn PDF document text
    • http://fuvituze.epizy.com/tenerife_air_crash_investigation_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/english_grade_10_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/idiot_s_guide_to_imessage.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_off0000c986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC986 5632 bytes
SHA-256: a69fde3b23d92cdbb09c4e355dffe7e6fba2b2be6a7d3f52de4648a72f6e9537
font_01_sfnt_off0000dcaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAA 10464 bytes
SHA-256: 139908c831ef6de058e9f5dc413077867f048648b7fb047c400219d57b2e3be5

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