Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c08a9afbf0c6a8…

MALICIOUS

PDF

124.3 KB Created: 2021-03-20 09:02:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27b47e7cbbbb498bd992bdff89d78259 SHA-1: d5cb970471dc41a9b8f139f8229565825802fcb3 SHA-256: f7c08a9afbf0c6a8aa7daea63c37d60bce91b19f4f77edf47a599c0b022227ea
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a secondary payload. The document body, though heavily obfuscated, suggests a lure related to 'classification of aluminium alloys'. No scripts were extracted, but the presence of external URIs and the nature of the PDF detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/award?keyword=classification+of+aluminium+alloys+pdf
    • http://osmosiotzs.fun/nixorejqxw67.pdf
    • http://natural-shop.info/motorola_mt350r_frsajwny.pdf
    • http://nanonewe.scienceontheweb.net/miwunim.pdf
    • https://cdn.sqhk.co/zifeduwa/Hgiibji/douglas_county_oregon_police_scanner_codes.pdf
    • https://cdn.sqhk.co/botonerepap/jaagfif/zataj.pdf
    • http://iclod.tech/what_are_the_4_critical_thinking_strategiescyfnf.pdf
    • http://raifaisentgo.online/agatha_christie_disappearance_for_11_daysqqsqi.pdf
    • http://natlegend.space/52395796442aw35g.pdf
    • http://rubeatyshop.xyz/how_to_control_surface_waterg7gol.pdf
    • http://swiss-gear.store/bomeforusezererobawtqtfe.pdf
    • http://pink-echo.club/pufadurone6i4x.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/71f01b46-89ca-4548-81ba-554155fd5fc0/nikijuvutigipupogurugoviw.pdf
    • https://uploads.strikinglycdn.com/files/e4531985-22c3-4d0e-85d3-2301ee55b3d5/nurujavavuzesegodelageduv.pdf
    • https://uploads.strikinglycdn.com/files/a098d771-aab8-4579-be42-39d14b2191ad/how_to_say_nasty_in_navajo.pdf
    • https://uploads.strikinglycdn.com/files/1e4b8f4c-8c2d-4702-90a9-ec8c5628bffe/homeready_income_limits_increase_2020.pdf
    • https://uploads.strikinglycdn.com/files/9a19a1a6-c561-4316-b513-1eeb8c2b5b96/matilda_roald_dahl.pdf
    • http://rosajeku.myartsonline.com/22791482880.pdf
    • https://uploads.strikinglycdn.com/files/0ecd79d6-8b14-416b-959c-b24fc18ff8a8/95642749554.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001866c.bin
3ebbaf15b07b593a757b27d621712835f5a4c0862fa3acc42c3b60b5f85aa54f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1866C 5092 bytes
font_01_sfnt_off000197aa.bin
ea72af25bbe771334e416e360875be5caec092654da2902b8b7208846649ff1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x197AA 12112 bytes
font_02_sfnt_off0001c116.bin
4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C116 16060 bytes
font_03_sfnt_off0001d5ae.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D5AE 4324 bytes

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