Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bee8f89acd39f4e…

MALICIOUS

PDF

75.1 KB Created: 2021-03-29 17:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d8007c9fd7f705c042378b50784ec958 SHA-1: b8896f9f82671ab698e962a9011fdd3e4f143f64 SHA-256: 4bee8f89acd39f4e7b37569fbc944285b95c4a4308586e5be754e46a36259714
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful websites. The presence of embedded URLs further supports this attack pattern.

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://vilenefex.ru/award?keyword=ethnic+conflict+resolution+pdf PDF link annotation
    • https://cdn.sqhk.co/wevosevob/dnhehg3/fawofenuzelezepojibigi.pdfIn PDF document text
    • https://cdn.sqhk.co/dodiniwotud/jbjhXig/star_wars_roleplaying_game_dice.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446921/normal_603549b831658.pdfIn PDF document text
    • http://everydayy.fun/bowepo6dc5d.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/positive_behaviour_support_strategies_disabilityveio5.pdfIn PDF document text
    • http://carishr.com/84862860731dg6n1.pdfIn PDF document text
    • https://cdn.sqhk.co/tatiwurixiwo/j79jiug/23957946030.pdfIn PDF document text
    • http://zabidegelid.iblogger.org/cha_cha_line_dance_step_sheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464534/normal_5ffa18925e356.pdfIn PDF document text
    • http://winoraama.fun/junefekerinomawaleno67wi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruguweronum.rf.gd/55498596657.pdfIn PDF document text
    • https://04a9e765-cf69-4035-9b9a-998d8fb4e692.filesusr.com/ugd/8c5016_834a018683a04f3493d08fb84ade97ad.pdf?index=trueIn PDF document text
    • https://d62ff7d9-aefc-4ab8-8cdf-af38868aea16.filesusr.com/ugd/54b9a1_5efcb0932c1c43209bafdde625594df3.pdf?index=trueIn PDF document text
    • http://getetir.epizy.com/gyro_compass_app_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2828b939-ce91-4b33-b3be-ad00beae4253/tovakuxalozutemetunul.pdfIn PDF document text
    • https://25f35837-e8ad-4357-b490-8f69bec4165a.filesusr.com/ugd/96c61c_1a9388c876334be5bc722a7c4c90ea98.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbccf6d9-dec0-4c90-95c5-b0af26763f85/what_can_i_eat_at_taco_bell_that_is_low_carb.pdfIn PDF document text
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_fd06dd2693c244a697a7d0af717a6772.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/470680b1-e801-4b85-ab44-0f5194076f69/dd_5e_players_handbook_the_trove.pdfIn PDF document text
    • https://22449060-8e30-4723-8828-967625cce342.filesusr.com/ugd/eddc50_303f939b4d7f4d9db979da8f1c232e92.pdf?index=trueIn 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_off0000ea28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA28 4992 bytes
SHA-256: d13f6ef9ec1247cf32c1c2774c3be73dde7cdd165214d6f731708bc73ac7edad
font_01_sfnt_off0000fb26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB26 10532 bytes
SHA-256: 49b7dfe5e4e60f4c6e184e231e579f305ba99a48c35d6b783464b8861a7ef2ee

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