Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea91a24f86db0ea0…

MALICIOUS

PDF

81.3 KB Created: 2021-04-06 03:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 1991151523df9f3007ad22bf4b7589c3 SHA-1: ce4c779a84245bd38dfeafb6ea77ec7e477bf75e SHA-256: ea91a24f86db0ea042bb0cf0e6db0a9a8176b6fa0243c17f4e934bf2b0103ed3
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, many of which point to disposable domains and are likely part of a phishing or scam campaign. The presence of a link farm heuristic further supports this, suggesting the PDF is designed to redirect users to malicious sites. No scripts were extracted, but the overall structure and URL distribution strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://lozipotod.ru/strik?utm_term=why+is+my+honda+accord+backup+camera+not+working PDF link annotation
    • http://aicberg.net/bijonuzidosifidiwobidirofqqt8.pdfIn PDF document text
    • http://wojisub.mypressonline.com/subunadifekerew.pdfIn PDF document text
    • http://wafixevewitope.mypressonline.com/jamekojin.pdfIn PDF document text
    • http://stavki-na-sport.site/vofexuvofuzuwipetolekuru1nzys.pdfIn PDF document text
    • http://fewomazojuxed.iblogger.org/1003315195.pdfIn PDF document text
    • http://lovewaits.ru/fossil_q_explorist_gen_5_release_dateao43y.pdfIn PDF document text
    • http://thedouche.xyz/mosojexikexunom2rhql.pdfIn PDF document text
    • http://com-signto2.xyz/kabokigurufomanatakikousox9.pdfIn PDF document text
    • http://love-your-lips.online/pototejuvodx1kd.pdfIn PDF document text
    • http://silkhfig.bid/80055827451k09pr.pdfIn PDF document text
    • http://posurazatux.mypressonline.com/single_phase_capacitor_start_motor.pdfIn PDF document text
    • http://ukrdomonis.xyz/whirlpool_cabrio_platinum_washer_not_turning_ond26ak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kovilowab/antietam_national_battlefield_guided_tours.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/how_to_install_trimmer_line_black_and_decker_electric.pdfIn PDF document text
    • https://5c126656-fc4f-473b-8c99-11744d2e1b96.filesusr.com/ugd/abd8ec_f192fee9a8004eff83926b2a6e76607c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/febopa/yandex_taxi__apk.pdfIn PDF document text
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_84ddf47ce5e64ceca377f249e02cd4fd.pdf?index=trueIn PDF document text
    • http://tirisesu.onlinewebshop.net/60921685061.pdfIn PDF document text
    • https://s3.amazonaws.com/masevewi/gazajugube.pdfIn PDF document text
    • http://xepevofopi.epizy.com/gumofowusafenevaxi.pdfIn PDF document text
    • http://semiwexojexudu.epizy.com/bahubali_the_beginning_full_movie_filmyzilla.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_off0000fe1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1C 5864 bytes
SHA-256: b775281d15adf453070dd5bb5b5a0951c7fda4ed7530e10bf3531dea21e95944
font_01_sfnt_off00011207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11207 11312 bytes
SHA-256: 55eb2ba2db55f0fc9c862c0b96d7c6e433c2800ddfe23bc591b3a3b6275be7e7

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