Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4623e7273d92a9…

MALICIOUS

PDF

76.7 KB Created: 2021-03-14 05:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a53b47a88624a0921abe65c45af46705 SHA-1: 5af7beb34e63aef6c7af552f3f289adee68cd6b1 SHA-256: 2a4623e7273d92a9b574e040ccc08229e44348e069da68394f196cf08924278b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary external links points to a URL associated with SEO poisoning tactics. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=zinik+wheels+22+inch
    • http://tijijosopake.22web.org/xuzopepedo.pdf
    • https://cdn.sqhk.co/lawafopugu/DZhdkzL/odd_eyes_vortex_dragon_tips.pdf
    • https://cdn.sqhk.co/kopilixa/Bie8gle/22851223221.pdf
    • https://cdn.sqhk.co/rawerusiwala/zVBibLH/27564296039.pdf
    • https://rutaluxunenore.weebly.com/uploads/1/3/0/7/130740368/sadidavowosetog.pdf
    • https://waweviruwupo.weebly.com/uploads/1/3/5/3/135311422/4247581.pdf
    • http://xulonagubalipa.66ghz.com/bavopefakolazidorori.pdf
    • https://mubazujozij.weebly.com/uploads/1/3/4/7/134705676/3363803.pdf
    • http://lalewenesuku.22web.org/61684145704.pdf
    • https://cdn.sqhk.co/duzimisese/gernl3p/can_you_get_live_local_channels_on_hulu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/pisik/brunton_m2_compass_manual.pdf
    • https://s3.amazonaws.com/tixedujegibex/14738260004.pdf
    • https://s3.amazonaws.com/wurivuve/ielts_reading_practice_test_30_with_answers.pdf
    • https://s3.amazonaws.com/xajowu/best_japan_travel_guide_2019.pdf
    • https://s3.amazonaws.com/rebesudanolo/sujet_brevet_physique_chimie_pondichery_2019.pdf
    • http://fisavisifesu.epizy.com/anis_merah_gacor_teler.pdf
    • https://s3.amazonaws.com/wizidimawag/99322929774.pdf
    • https://s3.amazonaws.com/gomaxod/jipujikow.pdf
    • https://s3.amazonaws.com/mikibetiv/kaxirugadoduvunugi.pdf
    • https://uploads.strikinglycdn.com/files/54b3e664-c5ec-445b-8e79-27766201453e/los_censores_luisa_valenzuela_resumen.pdf
    • http://tuzekejaxegis.epizy.com/wiwivuramusar.pdf
    • https://uploads.strikinglycdn.com/files/0bc2f364-b013-4863-a17c-b695260e2c71/snow_white_and_the_huntsman_2_streaming_sub_indo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfcc.bin
7523ae3b369a9b7fc72b7ec539839bc020226266146b5d70929cafb02e04a2f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCC 4424 bytes
font_01_sfnt_off0000eec8.bin
88712702a4ee7c93833fdcf8ced235c39f433ebbdeb611e6c05745483f5ff0c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC8 12320 bytes
font_02_sfnt_off000117a8.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117A8 4324 bytes

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