Malicious PDF — malware analysis report

Static analysis result for SHA-256 0194a5890aec807a…

MALICIOUS

PDF

79.5 KB Created: 2021-02-28 02:40:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 24345c324f7a9088175e904be20b06f8 SHA-1: dfadc38208bd47b9de2e22ed86fd0b7c358b8dde SHA-256: 0194a5890aec807a45e45eaec0447da9c7743abd028bee25c961ef459d3e1779
166 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests the document's content is designed to trick users into believing there are changes to payment instructions, a common tactic in business email compromise schemes. The presence of numerous external URLs, including one pointing to 'ponafet.ru', indicates the document is likely a landing page or a redirector for a phishing site.

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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.
  • 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://ponafet.ru/strik?utm_term=maax+spa+filters PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481280/normal_5fde5fba52b9d.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/iKkijUE/54143950257.pdfIn PDF document text
    • https://sedeberelaniku.weebly.com/uploads/1/3/6/0/136030724/4537929.pdfIn PDF document text
    • https://cdn.sqhk.co/buxifuludo/gj3jcib/dragon_city_mod_apk_download_unlimited_everything.pdfIn PDF document text
    • https://jipuziloki.weebly.com/uploads/1/3/2/6/132695969/korif-wenegoje-lefapogedexu-retinedun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459784/normal_603618df75685.pdfIn PDF document text
    • https://cdn.sqhk.co/tivomepu/jbVjev0/knife_hit_game_play_online.pdfIn PDF document text
    • https://cdn.sqhk.co/zamodozitip/yje3Bsp/how_to_swirl_a_perfect_ice_cream_cone.pdfIn PDF document text
    • https://cdn.sqhk.co/mudebijutene/bjfx1d4/japebevo.pdfIn PDF document text
    • https://cdn.sqhk.co/tajixixejafi/ge31jjH/microsoft_flight_simulator_2020_argentina_price.pdfIn PDF document text
    • http://nipizakevenuvis.scienceontheweb.net/rancilio_silvia_upgrade_kit.pdfIn PDF document text
    • http://vadosixajobirug.mygamesonline.org/alex_rider_scorpia_rising_english_creek.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/gjjghgh/ice_cream_delivery_malaysia.pdfIn PDF document text
    • http://warixedivukinat.mygamesonline.org/american_buffalo_broadway_opening.pdfIn PDF document text
    • http://xonigej.mypressonline.com/93937479438.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F8 4968 bytes
SHA-256: 82bc3261e9b41e6e4e85b72adff8b94fe83a62d8463e1a9f0851fc2ff33141b7
font_01_sfnt_off0000f4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FF 10924 bytes
SHA-256: 54d90de98e27a444f7e594bd671d812bbbcb1d1e2e02483fc4c54e7dd81d88dc
font_02_sfnt_off00011acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACD 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953

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