Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3f6773cf75622d…

MALICIOUS

PDF

73.7 KB Created: 2021-02-27 13:09:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: b9ebea313e35a6ffae740cb9d5678158 SHA-1: 30eb44fe076b2839e965ca42a7e1844ff01d1a8c SHA-256: 7f3f6773cf75622d52ca6f3c1384681362221e42953b9584b23d5d066e48a7b1
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, suggests a lure related to a book review, likely intended to trick users into visiting the malicious URL for phishing or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/award?keyword=the+stranger+camus+book+review PDF link annotation
    • https://cdn.sqhk.co/rekewuneboxu/gidih9G/sugonesegimilur.pdfIn PDF document text
    • https://cdn.sqhk.co/gabisolovima/he8ljfB/earn_to_die_2012_unblocked_4_life.pdfIn PDF document text
    • https://cdn.sqhk.co/sadinuko/i1KP2ug/sipojodobuxotekol.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/haOpjly/police_auctions_mn_cars.pdfIn PDF document text
    • http://xamoxipuwizutux.scienceontheweb.net/what_to_include_in_a_film_pitch.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/gphaLWw/dinijadujodiminiwojedagi.pdfIn PDF document text
    • https://cdn.sqhk.co/kewusikata/jdHZcjf/48896981882.pdfIn PDF document text
    • http://xubanapirobula.mypressonline.com/69713028777.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/5e_monster_template_word.pdfIn PDF document text
    • http://pupezawat.scienceontheweb.net/50878070418.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/folexapurilowe/23732094844.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/rebigurovikuriduke.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/tidakaf.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/god_meme_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/arthritis_uk_knee_pain_exercises.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_off0000e470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE470 5484 bytes
SHA-256: 6fb8c7c282b9661772455773af93c871035bcfae74ec289836d18f906989dcf3
font_01_sfnt_off0000f703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF703 10192 bytes
SHA-256: 6584e94b035ee55262420563e5d55974723c0b1be09b0323bb2ed2b392144ac8

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