Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a74b0cc9db8a9ad…

MALICIOUS

PDF

71.8 KB Created: 2021-05-14 20:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df6769337c0258181bf423a5e83dd643 SHA-1: e22d4d72e49e773474a8116f427c816af8784b59 SHA-256: 5a74b0cc9db8a9adf998f355c38396587a88a18f359c0a88281f7d77e1faaa26
96 Risk Score

Malware Insights

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

The file is a PDF document that contains numerous embedded URLs, one of which is flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, appears to contain keywords related to the malicious URL, suggesting a lure.

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://nipisod.ru/strik?utm_term=drive+mobility+scooter+replacement+batteries
    • https://cdn.sqhk.co/dogutadova/iejbjaW/ww2_polygon_rexdl.pdf
    • http://bumasujofoj.getenjoyment.net/what_is_beneathas_dream_in_a_raisin_in_the_sun_quotes.pdf
    • http://valigulepi.scienceontheweb.net/morfologia_ancylostoma_duodenale.pdf
    • http://jugapus.sportsontheweb.net/81297217089.pdf
    • http://nafepuzemobir.sportsontheweb.net/sivalodenisujunejajomav.pdf
    • http://koxivesuvif.mypressonline.com/13741966328.pdf
    • https://cdn.sqhk.co/xuzuvazol/gwqSpdR/super_starfish_all_zones.pdf
    • https://cdn.sqhk.co/metexemoraga/SZKMjjf/business_insider_italia_wiki.pdf
    • https://cdn.sqhk.co/xidizizo/XKKggih/48643208581.pdf
    • https://cdn.sqhk.co/lilomovetum/aiadsif/wufekijiwamadivubezijoze.pdf
    • https://cdn.sqhk.co/kapokosop/iR9PivY/stick_zombie_arena_4.pdf
    • http://sumodena.getenjoyment.net/qaamuuska_af_soomaaliga_1976.pdf
    • http://dodajavux.scienceontheweb.net/autocad_tutorial_drawing.pdf
    • http://muwiduvepobuz.mygamesonline.org/glencoe_advanced_mathematical_concepts_precalculus_with_applications_answers.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sulorowanutabu.atwebpages.com/diffusion_of_innovation_rogers.pdf
    • http://vegubom.atwebpages.com/5040594736.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_off0000dceb.bin
8e5062703042618b7c62a32d97fda3fe3f4c19959f1f78dacc4c50da69662bec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEB 5380 bytes
font_01_sfnt_off0000ef2e.bin
bf1d48506a56a3723e7060fea1fb91dd5ea95ec822054b5e4694ee057881b052		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2E 10152 bytes

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