Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff9ebc6b9da78d9a…

MALICIOUS

PDF

78.8 KB Created: 2021-03-23 13:30:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bb0d390c7bb94498bf19987708c080e SHA-1: 9e3e51c1cd641fbc403fd1e79c2b64d9d9ca4e89 SHA-256: ff9ebc6b9da78d9a0bf96cb46b0913f7913542691a3e70e8337e7135a9f8246c
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as a potential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a theme related to franchising, likely to trick the user into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://maypoin.ru/award?keyword=franchise+adalah+pdf
    • http://bimovixexena.scienceontheweb.net/bwv_1052.pdf
    • http://gewusoluxul.scienceontheweb.net/vukekomovifubudipi.pdf
    • http://zatoboyvibor.fun/armored_warfare_tank_guide23gv2.pdf
    • https://cdn-cms.f-static.net/uploads/4391920/normal_604b085ae99d3.pdf
    • https://cdn-cms.f-static.net/uploads/4464995/normal_602d3e82740cd.pdf
    • http://instapriz24.online/15449514951wkk6d.pdf
    • https://cdn-cms.f-static.net/uploads/4459163/normal_60209219bb893.pdf
    • http://nevinidonet.mywebcommunity.org/63460195180.pdf
    • https://cdn-cms.f-static.net/uploads/4426686/normal_6054f1b8baf0f.pdf
    • http://linefofaxugedu.mywebcommunity.org/boss_monster_cards.pdf
    • https://cdn-cms.f-static.net/uploads/4389355/normal_600da0b2e0179.pdf
    • http://viwoxufegoger.sportsontheweb.net/genero_enterobacter.pdf
    • https://cdn-cms.f-static.net/uploads/4454665/normal_6059a61019be1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zuguvoxoki/what_is_considered_a_good_psat_score_for_an_8th_grader.pdf
    • https://s3.amazonaws.com/suxugipipolazog/computer_bill_format_excel.pdf
    • http://jetotajasavesi.atwebpages.com/revawowijadamunu.pdf
    • https://s3.amazonaws.com/defujo/registration_form_template_angular.pdf
    • https://s3.amazonaws.com/zesotat/livujozabironusibegox.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7bf.bin
7b22a3909010777c3e1461c2f837f643e08ba07d6a2f13d5dc0de5cca1aa19c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BF 5196 bytes
font_01_sfnt_off00010962.bin
a70ac5e5cfc9129528e23c9e453cf6d5dddc2d44c0dc61d50e41604d7eaf81ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10962 10828 bytes

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