Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2229fe0184b2237…

MALICIOUS

PDF

73.7 KB Created: 2021-03-08 21:26:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 16a61fd5af436007b4ad1ae1292479e3 SHA-1: 9a945da77de22d4fc7b1a01cf32514979067de26 SHA-256: f2229fe0184b22377e4fcd74031f0616f6fb9b33662146a8e4c01650caf0daa2
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains multiple embedded URLs, one of which, https://xajibur.ru/123?utm_term=best+card+battle+games+android, is flagged as a potential phishing or malware distribution point. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external links points to an attempt to redirect the user to a malicious site.

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://xajibur.ru/123?utm_term=best+card+battle+games+android PDF link annotation
    • http://fusagawi.iblogger.org/css_grid-_template-_areas_invalid_property_value.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375070/normal_602ffcf17971d.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunudixa/jg7ridc/hangout_word_meaning_in_urdu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393637/normal_5feb5618d122a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370052/normal_5fe41cec2f846.pdfIn PDF document text
    • https://cdn.sqhk.co/sadopore/ghggWij/beponapatujunol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446762/normal_603034adc5729.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/hjQnjfl/rechargeable_batteries_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452837/normal_6045c7c8ccf09.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwifemi/gg6gggj/kujowutokilaguwaki.pdfIn PDF document text
    • https://cdn.sqhk.co/dafibuxoki/gnjiW8j/niragadatobifojamufil.pdfIn PDF document text
    • https://cdn.sqhk.co/xomakonezema/jbungic/ganadadekid.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/ihddhez/tolusozutugole.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nupenoxiwuvem.epizy.com/21867451336.pdfIn PDF document text
    • http://memenusaduso.rf.gd/aggresome_formation_and_cancer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c355f8c6-a81f-40f0-87c1-f0c1209f209b/ninja_professional_blender_1000_replacement_blade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55b89de1-2699-48f3-963d-9739e599618b/24455976692.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_off0000e3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B4 5448 bytes
SHA-256: f4d9406c3d32bf40da4eec5e00a049970075abaa35e27f11c4b0d9736ee7611b
font_01_sfnt_off0000f627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF627 10580 bytes
SHA-256: f65f9203a100098ce30ca185143c42246dad00fc4a48d0e28de3b0955d08c2ed

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