Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a527536d8c4e561…

MALICIOUS

PDF

76.4 KB Created: 2021-03-20 16:50:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ae1762d45bb0e3a1ad1747b6fc296e2a SHA-1: 14d7099a7eda8e7d213f95c46c57a6c428953667 SHA-256: 6a527536d8c4e561798de4a0a5dad3541fe295997f64a5b62ac0c45daf603483
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/award?keyword=creative+writing+skills+pdf PDF link annotation
    • https://cdn.sqhk.co/mowuseparap/Zjgcmih/swing_rider_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/ByWhlge/xunaxatolezanebos.pdfIn PDF document text
    • http://mosemajubuj.22web.org/lidefigidufofi.pdfIn PDF document text
    • https://cdn.sqhk.co/vilitemeru/jjhbpRZ/ringtones_free_zedge.pdfIn PDF document text
    • http://metazexepajesen.22web.org/murewofofovamal.pdfIn PDF document text
    • http://rutopadazemed.22web.org/calendario_2020_bolivia_feriados.pdfIn PDF document text
    • http://clientesdkb.com/nupemogilomevinermsr.pdfIn PDF document text
    • http://mebelintera.ru/85481347525q8gzl.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/72097593742.pdfIn PDF document text
    • https://cdn.sqhk.co/jurunuxetal/jZgdzgi/adnan_sami_songs_320kbps.pdfIn PDF document text
    • http://rowexusaje.mypressonline.com/posugavimojujopavekex.pdfIn PDF document text
    • http://mojikinewosak.22web.org/what_does_creon_tell_oedipus.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/hhKLcx2/doodle_devil_ps4_walkthrough.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puwagof.rf.gd/7235130694.pdfIn PDF document text
    • http://fegoluvarelewum.myartsonline.com/pakatan_harapan_manifesto.pdfIn PDF document text
    • http://nilidax.epizy.com/bomopudujoxugin.pdfIn PDF document text
    • http://kesobiw.rf.gd/8988540115.pdfIn PDF document text
    • http://munoxefarofow.rf.gd/junewovuwowiwojazuvagi.pdfIn PDF document text
    • http://misovin.epizy.com/moto_360_sport_2nd_gen_review.pdfIn PDF document text
    • http://bimekikup.epizy.com/scratch_online_free.pdfIn PDF document text
    • http://pagikojezokatu.rf.gd/java_netbeans_tutorial_download.pdfIn PDF document text
    • http://mibofive.epizy.com/ace_personal_training_book.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/problemas_de_estadistica_inferencial_prueba_de_hipotesis.pdfIn PDF document text
    • http://miwewugewu.atwebpages.com/67906595694.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCD 5332 bytes
SHA-256: a44829c201d265cb955bd3c72c443210c66d89227c5103d0300bd88ccb0a9383
font_01_sfnt_off0000ff1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1D 10824 bytes
SHA-256: 74c0de8c81640a378d6dccaea755e83aa40fc703c8b7d5726ce34e4329457914

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