Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec17e4aa476de491…

MALICIOUS

PDF

80.2 KB Created: 2021-05-07 15:16:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b2c255f432d166bc4f3ba7e29791222f SHA-1: 9d25dc6e72dc33b7d8edb9daab6b698594ce2257 SHA-256: ec17e4aa476de4917666750e3a6c029352f9de82c8c981c36b4cf7c4a521cf95
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File Execution: User Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a ClickFix paste-and-run lure. 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 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://kuzutuzo.ru/strik?utm_term=install+motioninjoy+driver+fail+error+code+0x-1ffffdb9+windows+10 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490123/normal_605f6ba84aac6.pdfIn PDF document text
    • http://sabujunakeves.iblogger.org/3544794465.pdfIn PDF document text
    • https://bekazavaf.weebly.com/uploads/1/3/5/3/135327011/pugaxinanafiwaj-litapofuvemanus-pukenibu.pdfIn PDF document text
    • http://rorasilozaput.22web.org/xuzem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411219/normal_603bfe61b6714.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426549/normal_5fef48165c0d5.pdfIn PDF document text
    • http://sipezolenanuwep.22web.org/first_alert_brk_7010b_hardwired_smoke_detector_with_photoelectric_sensor_and_battery_backup.pdfIn PDF document text
    • https://vukisopir.weebly.com/uploads/1/3/0/7/130776420/cab6c62.pdfIn PDF document text
    • https://kademagora.weebly.com/uploads/1/3/4/8/134850034/sofaki.pdfIn PDF document text
    • https://mawubuzepegi.weebly.com/uploads/1/3/3/9/133989242/6964460.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409818/normal_600aeb963069b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/505cd237-fcca-45b8-873a-b6ac817cec95/playstation_network_sign_in_error_ce-33992-6.pdfIn PDF document text
    • http://mufigodukusa.epizy.com/crosshatch_mens_size_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31eb9a93-7924-4f19-99af-9d6c329ba082/how_to_stretch_a_karate_belt_wikihow.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/what_are_the_five_intermolecular_forces.pdfIn PDF document text
    • http://gevejonitu.onlinewebshop.net/23077210756.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/fagumeperipitogon.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/wofebilama.pdfIn PDF document text
    • http://vizebafep.epizy.com/88623201393.pdfIn PDF document text
    • http://xifeloj.onlinewebshop.net/vector_canoe_manual.pdfIn PDF document text
    • http://jomupaz.myartsonline.com/wuwibobejewumemuzebip.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/finite_mathematics_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4b044dd-2696-4a25-a4d1-f74b794f01dc/christopher_hitchens_god_is_not_great.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91b23221-1011-48dd-8e0a-1134898c219c/create_json_format_in_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45ad416a-6de8-4fe4-b63d-0f69931ec7ab/12715346510.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_off0000f7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D2 6024 bytes
SHA-256: c42a861ce8bd7e312773d2e31da743583412d62ed5a5d6a567a7a884074b2c9e
font_01_sfnt_off00010c62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C62 10524 bytes
SHA-256: 5005cccb686599b1bc33e2a306792497e873866c16b2450ef03069d3f4aea812