Malicious PDF — malware analysis report

Static analysis result for SHA-256 092c38d7eabb5aef…

MALICIOUS

PDF

165.9 KB Created: 2021-02-05 08:15:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0e5c3dd622b489822a9e995d1a423851 SHA-1: f96c707e2179092bc9f6171ac7fbe04bd6d298d8 SHA-256: 092c38d7eabb5aef73ffa4c8e59e6aa4759a62f1231b92f9d4c3924d6fa0202c
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including ML classifiers and ClamAV, indicating malicious intent. It contains numerous embedded URLs, with one redirecting to a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The 'SE_MFA_LURE' heuristic indicates the document is designed to harvest credentials or abuse multi-factor authentication, likely by directing the user to a fake login page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://baarspo.ru/aws?utm_term=gaming+tablet+android+philippines PDF link annotation
    • http://natfreshik.fun/tepur8ri5s.pdfIn PDF document text
    • http://the-job.ru/85043674031t77w9.pdfIn PDF document text
    • https://zizojatemizowen.weebly.com/uploads/1/3/4/0/134016780/dosinalararele-sizumadini-malirepuvegenu.pdfIn PDF document text
    • https://juputifewusa.weebly.com/uploads/1/3/4/4/134435955/101e887d.pdfIn PDF document text
    • https://zovezeko.weebly.com/uploads/1/3/4/6/134697242/6877913.pdfIn PDF document text
    • https://ranaxeli.weebly.com/uploads/1/3/4/4/134478161/weruf_mufufavafine_revuwideduneg_fonigoj.pdfIn PDF document text
    • https://tuxuboninivufos.weebly.com/uploads/1/3/4/4/134478209/dawufexo.pdfIn PDF document text
    • http://vorecan.space/277653830428ypu6.pdfIn PDF document text
    • https://jusopusoguwukul.weebly.com/uploads/1/3/4/4/134494455/wururedisirita_gefilovu_jebuladefupuxe_towaborug.pdfIn PDF document text
    • http://nakidki-alkantara.xyz/wewozugilujadugowaxicirv6.pdfIn PDF document text
    • https://legutuxubumid.weebly.com/uploads/1/3/1/8/131872058/4685331.pdfIn PDF document text
    • http://geguxejap.22web.org/tepus.pdfIn PDF document text
    • http://bnatural.space/nolerebekuwemaroguk5jsw.pdfIn PDF document text
    • https://cdn.sqhk.co/riwifesineji/RgfdShh/sakelupevujitoku.pdfIn PDF document text
    • https://kuxubujokug.weebly.com/uploads/1/3/0/7/130775750/3590334.pdfIn PDF document text
    • https://vofaxarexokuj.weebly.com/uploads/1/3/4/7/134762848/sutelonixoxuwanemusi.pdfIn PDF document text
    • https://nujetamewude.weebly.com/uploads/1/3/4/8/134881912/kogegebizi_naxixusafefu_kujajidiroko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zunuwovadete.epizy.com/ap_calculus_bc_logistic_growth_worksheet.pdfIn PDF document text
    • http://wetavirevamo.epizy.com/warhammer_total_war_2_empire_guide.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_off00024f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24F13 5544 bytes
SHA-256: c56fa9d35fc3639f23214836bb2eba5ed1cb172ae1fd8ec0cd3155c445ad90c3
font_01_sfnt_off000261ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x261BA 11676 bytes
SHA-256: b7e070206079de8b9ad5084cd7316e3e669c451915c36a2e9878d8e447cd2b2e

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