Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4a3a0bbd7dda7a6…

MALICIOUS

PDF

79.0 KB Created: 2021-03-16 19:25:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3b777fdbfbc0dabd66359c521a26ea8d SHA-1: ebf58157ec9798c5e4f8fda9f1613124cf733bf0 SHA-256: e4a3a0bbd7dda7a6785ebb99c5a363920d238cc5defaf600077230b6f8af2878
124 Risk Score

Malware Insights

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

The PDF contains a high number of embedded URLs pointing to various domains, many of which are flagged as part of a link farm on disposable hosting. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the extensive use of external links suggests a redirection mechanism to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5050

Heuristics 4

  • 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
  • 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://vilenefex.ru/wix?keyword=oxo+barista+brain+grinder+manual PDF link annotation
    • http://greatholl.com/are_you_allowed_to_drive_at_14lyl1h.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/Rgfjj6K/adventureland_park_discount_code.pdfIn PDF document text
    • https://cdn.sqhk.co/wopeporamo/j5MijOg/senate_polls_map_fox.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/hjVEici/download_game_super_phantom_cat_2.pdfIn PDF document text
    • https://cdn.sqhk.co/pafitevet/hi5egeN/appa_movie_video.pdfIn PDF document text
    • http://udilische.club/morutivuwarokoxaro2ocy9.pdfIn PDF document text
    • http://fiselijuduguge.iblogger.org/jebuketemexazesevepuder.pdfIn PDF document text
    • http://pubgmobiie.com/bapifikozanotigoloxakxyme.pdfIn PDF document text
    • http://foxujosavubisi.22web.org/36827492489.pdfIn PDF document text
    • http://bossyonlinex.com/book_review_of_the_outsider_by_albert_camus2w5rc.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/zurovajij/antergos_installer_error_can_t_needed_packages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a378f712-8d9b-4575-842d-d123cf4f449a/81161545580.pdfIn PDF document text
    • https://f395d2f2-f939-483b-815f-81062d4747ff.filesusr.com/ugd/be2697_cf637fe89973432ab53a4f06adfcf99b.pdf?index=trueIn PDF document text
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_5b24ec2a6d4946a4b078f40cd1ade3ac.pdf?index=trueIn PDF document text
    • https://f608bf75-187c-4b28-9621-af925c05c2b6.filesusr.com/ugd/05e3ad_5bf31feb784d4e7e8d753efea3e8be4b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/61dfd367-ff86-4b6f-8086-45533f701c20/sogavalirodiliw.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/somidapogaberi.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/70342240428.pdfIn PDF document text
    • http://jarunotaso.rf.gd/fishing_gear_freshwater.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/boat_drawing_images.pdfIn PDF document text
    • http://minapisifiret.rf.gd/is_a_harley_rake_worth_it.pdfIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_f4e5bee6f0b54d2f89ad9bc3a1b222ce.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3959aaec-b5f6-401e-8a97-e0b700737372/ashtanga_yoga_sequence_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1939e8aa-4e29-4937-b46c-8dd734a636c8/singer_simple_sewing_machine_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/cs_energy_limited_annual_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/254ad7b3-e404-400d-8fe3-90d22f1a489a/luwofojas.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A4 5380 bytes
SHA-256: 88b4b3df98fa5127be2fcb00fa3c7735ff3f5b96e7451cb174df3493ac92c2ea

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