Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f91c8aba9e6755e…

MALICIOUS

PDF

95.7 KB Created: 2021-03-23 09:16:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a93d14e2442cb4d4e8fc314f517ede5c SHA-1: 9edf8284b0728b6ae3b0d73e6c6059bb1422171d SHA-256: 0f91c8aba9e6755e652cce3596ff485064e5cbf2658f7c7506e8ac5563d2c13a
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The document body is heavily obfuscated, but the presence of external URIs suggests an attempt to redirect the user to a potentially harmful site. No scripts were extracted, but the PDF structure itself is indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/wix?keyword=woodbury+grammar+school
    • http://creamwalls.online/ganizuxawudikujupenug147w.pdf
    • https://cdn-cms.f-static.net/uploads/4374362/normal_6049742027db6.pdf
    • http://plusstore.pro/xscape_traces_of_my_lipstick_zipk6xs9.pdf
    • http://bnl-jobs.com/difomafidk0mtu.pdf
    • http://antonio-ita.space/constitucion_mexicana_articulo_141fjt2f.pdf
    • https://static.s123-cdn-static.com/uploads/4421613/normal_5ffdf566c7f8e.pdf
    • http://bonusiotsbera.online/upsc_all_books_in_hindi_downloadydrc0.pdf
    • http://juvozukatug.66ghz.com/ziludolide.pdf
    • https://cdn-cms.f-static.net/uploads/4403947/normal_602d20e278539.pdf
    • http://misirabul.22web.org/98323015362.pdf
    • http://trells.space/geralowuwebonjtss.pdf
    • https://static.s123-cdn-static.com/uploads/4414167/normal_5feec7c958659.pdf
    • https://cdn-cms.f-static.net/uploads/4375093/normal_6051043e04f39.pdf
    • http://nikaold.site/consonant_blends_worksheet_grade_3rjhzk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/bulikowexunepov/plantronics_backbeat_fit_3100_troubleshooting.pdf
    • http://nevurewajarip.epizy.com/spring_dependency_injection_interview_questions_and_answers.pdf
    • https://s3.amazonaws.com/wixamupelinere/66469102555.pdf
    • https://s3.amazonaws.com/fovezewi/magnifying_glass_emoji_game_answer.pdf
    • https://s3.amazonaws.com/gatazeromij/rewiwatuw.pdf
    • https://s3.amazonaws.com/vuzufexarevima/black_fly_mod_apk.pdf
    • https://s3.amazonaws.com/vobuturinivi/dizagitepasovalopovebuvif.pdf
    • http://tijejawoporufil.epizy.com/voxasujikuvab.pdf
    • https://s3.amazonaws.com/lixasifasi/5496504883.pdf
    • https://s3.amazonaws.com/zarusegibitumet/tafegelerikubot.pdf
    • https://s3.amazonaws.com/risalenefazozo/men_s_t-_shirt_mockup_templates_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012738.bin
74412f53de7f8a51a1db9457b2a75b900aaf94465c63f80010213be116182774		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12738 5140 bytes
font_01_sfnt_off000138b7.bin
e4261c5b84b36fc88caea7043f946942d4e10677a4f96a53fa1328449f44efa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138B7 12696 bytes
font_02_sfnt_off0001635f.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1635F 4324 bytes

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