Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a540de4a1764ea2…

MALICIOUS

PDF

144.4 KB Created: 2021-03-18 17:29:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6afde202abd8a9b4a468caa873b007b5 SHA-1: 7119232688ec0a7376fb246bb63b45d534a8acc3 SHA-256: 0a540de4a1764ea21a7dba1c98fe923acc9a2defa6a21db2fcfe76975fb05605
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external URLs suggests 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-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://botokaw.ru/wix?keyword=pathfinder+extra+panache
    • http://like-store.site/google_play_games_free_chessl895x.pdf
    • https://cdn.sqhk.co/marixefe/ZTo2jb8/craigslist_sfv_free.pdf
    • http://domainlimax.xyz/biwuguni26e7r.pdf
    • http://salonhq.xyz/memory_encoding_failure_examples4vkhi.pdf
    • https://cdn.sqhk.co/tisewesir/41e3geC/gimukinobozasiwerev.pdf
    • http://instasale.company/costing_methods_in_manufacturing37rsj.pdf
    • http://vizit.store/fudonajabejapofezoxigozueal3n.pdf
    • http://moneyindia.site/nelumoleboluferiwarikukifju6.pdf
    • http://fejugutafilevin.scienceontheweb.net/physical_chemistry_formula_sheet.pdf
    • http://futup.ru/lewevofjkk5n.pdf
    • http://thedefenseforge.com/327584692546fg9x.pdf
    • http://gedirobidepud.scienceontheweb.net/why_did_the_subtle_knife_break.pdf
    • http://pozezan.mygamesonline.org/47335665845.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gurabagoderes.atwebpages.com/58451389070.pdf
    • https://s3.amazonaws.com/tamobalasu/sumuvefigevofevozupitusom.pdf
    • https://s3.amazonaws.com/bededuxotulapil/6567782261.pdf
    • http://zonatitusajobo.onlinewebshop.net/nursing_care_plan_for_acute_kidney_injury.pdf
    • https://s3.amazonaws.com/tuxutedi/karcher_pressure_washer_gun_leaking.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_off0001febe.bin
857102d133743d5f69a971556a4639d376849ef468e6563f9f261ab64b1d576c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FEBE 5104 bytes
font_01_sfnt_off0002101d.bin
f28b7ea7b8b2e250716c380871775132685793e43567277ea09201b41f3009fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2101D 10604 bytes

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