Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f6f096dd8cf8d86…

MALICIOUS

PDF

93.1 KB Created: 2021-04-04 13:28:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45679078f1b98e0b28b23aaa46f5e358 SHA-1: dd2e8ae98d9d8aeea778dab7579096ec3754da3f SHA-256: 5f6f096dd8cf8d86c6083eb1f7fe083acb8e3251dbf703e9614a66bd1120c5c1
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text related to online translation and mentions wkhtmltopdf, suggesting a lure. An embedded URI points to 'resalured.ru/award', which is likely part of the phishing or malware distribution infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://resalured.ru/award?keyword=online+translate+pdf+file+to+english
    • https://static.s123-cdn-static.com/uploads/4446272/normal_5fccaf9c56485.pdf
    • https://cdn-cms.f-static.net/uploads/4403408/normal_5fe9927a1872a.pdf
    • https://static.s123-cdn-static.com/uploads/4458145/normal_5ff97523c0bf4.pdf
    • http://jomotew.iblogger.org/wigemojuka.pdf
    • https://cdn.sqhk.co/solaxutom/XhjyBjh/forest_rescue_2_free_download.pdf
    • https://cdn-cms.f-static.net/uploads/4480145/normal_600b3f657bb3c.pdf
    • https://cdn-cms.f-static.net/uploads/4365591/normal_60421997294f8.pdf
    • https://cdn.sqhk.co/lerapuraroke/dMjaQjc/dell_emc_sourceone_data_protection_software.pdf
    • https://cdn.sqhk.co/sixepatexup/Bhiidhf/xufamogisu.pdf
    • https://static.s123-cdn-static.com/uploads/4499958/normal_5fcdea51926eb.pdf
    • http://babuzarovesi.iblogger.org/60948716090.pdf
    • https://cdn.sqhk.co/sogefuluf/haNhiih/41540442611.pdf
    • https://cdn.sqhk.co/xejadukoxeta/hatqphb/90043442752.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/ligole/pixajigikad.pdf
    • http://ratadipemor.epizy.com/17167194080.pdf
    • http://rowezezivifa.epizy.com/8131084029.pdf
    • https://s3.amazonaws.com/minegikukovel/23660595931.pdf
    • http://toxenekotu.rf.gd/bokobax.pdf
    • https://s3.amazonaws.com/panalipolifod/jurnal_bioremediasi_air.pdf
    • https://s3.amazonaws.com/tobojelusiwi/tadatajeme.pdf
    • https://s3.amazonaws.com/gotitibekovi/21479593916.pdf
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_2b93961b2b224615bb6999152a2b4f4d.pdf?index=true
    • https://ac734925-007a-49fa-9a6b-2340142042ec.filesusr.com/ugd/ea78e0_5791359f90bf4c73b1db260a9928e1df.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118e3.bin
ef73be095d49f22682443a8efa464a8cdabaa5e598497dde9ff17719e83af79e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118E3 5328 bytes
font_01_sfnt_off00012af9.bin
07a84d149a71cf6e43534a183575035b13d3f63d72b530dd9bedc54706cb79df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF9 11192 bytes
font_02_sfnt_off00015160.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15160 16204 bytes

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