Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a3330bc009f9b5a…

MALICIOUS

PDF

70.1 KB Created: 2021-02-23 21:05:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: d97f064087ba66fbe2269f9893acdd8f SHA-1: 4567554cf1ab2b0575160f33f4012d66cb146f1d SHA-256: 0a3330bc009f9b5a9424953bf044daf7b49e7a0815a50b8164169976a3c70ae9
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to a suspicious domain associated with a keyword search for 'stick warriors hack ios'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm on disposable hosting, further supporting a malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature, likely involving phishing or malware distribution via the linked content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=stick+warriors+hack+ios PDF link annotation
    • https://cdn.sqhk.co/nilofixogezu/hgcgCEX/airline_commander_a_real_flight_experience.pdfIn PDF document text
    • http://smilex.club/simile_metaphor_personification_examples0pqfh.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/X7zcijc/occupational_health_and_safety_act_poster.pdfIn PDF document text
    • https://cdn.sqhk.co/gejixoneku/bQihjeS/80212144416.pdfIn PDF document text
    • https://jisuzinux.weebly.com/uploads/1/3/4/6/134671095/3574035.pdfIn PDF document text
    • http://baxijemapuzoxu.22web.org/92388571515.pdfIn PDF document text
    • http://wogamilip.iblogger.org/whats_new_on_the_taco_bell_menu.pdfIn PDF document text
    • http://timurberg.ru/zafisezolabotewiruvnm9vi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422628/normal_5fc9ad7c01980.pdfIn PDF document text
    • http://2020coupons.info/dengue_guidelinecw51n.pdfIn PDF document text
    • http://zegevuk.22web.org/mailbox_size_office_365_report.pdfIn PDF document text
    • http://kindraretterath.com/jazz_piano_lessons_video_downloadz4zuh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jodirexefakevub.rf.gd/sait_electrical_engineering_technology_courses.pdfIn PDF document text
    • http://favekagopu.epizy.com/l_alcoolisme_chez_les_jeunes.pdfIn PDF document text
    • http://sujobej.epizy.com/passive_voice_worksheet_grade_5.pdfIn PDF document text
    • http://jusarim.epizy.com/manual_airway_suction_devices.pdfIn PDF document text
    • http://tovujopojat.epizy.com/chevrolet_ss_service_manual.pdfIn PDF document text
    • http://pexevogawi.epizy.com/cisco_asa_firewall_troubleshooting_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_off0000d8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C0 5112 bytes
SHA-256: 578cc0c75fa563407b23198d6ff1cff10c33c3c9149ceb18b9d64811ced7dcad
font_01_sfnt_off0000ea35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA35 9772 bytes
SHA-256: fba2ed5bb4282119785f9bb14837ce6004af49d8ed7c00d5f20cf222ca968b36

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