Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22306b3f0debc82…

MALICIOUS

PDF

72.4 KB Created: 2021-02-22 05:45:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d7f7c3d505ce69f1b08a06895e2b8270 SHA-1: e8c12d15ac97595bafcfe49ffac8742aa6ef03c4 SHA-256: a22306b3f0debc8203a75434f07e8d089b0689a9fb5bf51d37cedeb9ac940ec3
184 Risk Score

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
  • 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 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=la+joya+independent+school+district+human+resources In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_6010d040e84bf.pdfIn PDF document text
    • https://vanopatabef.weebly.com/uploads/1/3/1/4/131407067/nopesalox-biwuga-weleboribuxal.pdfIn PDF document text
    • https://vujajewuriwox.weebly.com/uploads/1/3/5/3/135387523/zegodeliniz.pdfIn PDF document text
    • https://pafuxasakilufa.weebly.com/uploads/1/3/5/3/135327400/4068e4ba620e45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366961/normal_601e357854067.pdfIn PDF document text
    • http://betabudon.iblogger.org/etica_para_amador_capitulo_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380086/normal_5fe2895384a3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390681/normal_600761b3cff29.pdfIn PDF document text
    • https://wofovado.weebly.com/uploads/1/3/1/8/131871653/4984859.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411682/normal_5fe15cf8d4263.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414866/normal_5ff3cf634980d.pdfIn PDF document text
    • http://wavokumad.iblogger.org/pifux.pdfIn PDF document text
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/zamalodinidagosifi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374380/normal_6003eaf010c1c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gemiwojo.epizy.com/tezuzixinejanoru.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/ncandweni_christ_ambassadors_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/23927742056.pdfIn PDF document text
    • http://sisuraregimu.rf.gd/ios_13_beta_8_ipsw.pdfIn PDF document text
    • http://najedir.rf.gd/19855519704.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/bisleri_camel_ad.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_off0000dd4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4E 5432 bytes
SHA-256: d91b57b25129dc00345678aa361287518f25aad9118521457b2aef1c565fd951
font_01_sfnt_off0000efae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAE 10776 bytes
SHA-256: 93989a46fe62c11efcdada690bcd4420ffa096cfe0595dacf93726ad97975dfd

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