Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f3c6c6d3a1e8d3c…

MALICIOUS

PDF

84.8 KB Created: 2021-03-14 13:54:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 517f51381a9a02a59bcef624068f9b7d SHA-1: 8329de9d5a4c431d5ea190a097af7ab41fef4b43 SHA-256: 2f3c6c6d3a1e8d3cded0565b87a953ac240a6b378ce54640f5d162bd472c984f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The document body, though heavily obfuscated, contains text related to search queries and PDF links, suggesting a SEO link farm or phishing lure. The presence of external URIs, particularly the one pointing to 'vilenefex.ru', reinforces the likelihood of a malicious redirection or download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/award?keyword=solved+problems+on+compton+effect+pdf PDF link annotation
    • https://cdn.sqhk.co/xadakede/nnidQyQ/highest_goal_scorer_english_premier_league_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/lifudidu/ba7jfgg/gosofugutumi.pdfIn PDF document text
    • https://cdn.sqhk.co/xajamenujo/hgAhdia/ritab.pdfIn PDF document text
    • https://cdn.sqhk.co/nolagutotato/Sjj3haG/red_ball_go_between_buildings.pdfIn PDF document text
    • http://madoxorijegobe.sportsontheweb.net/what_is_the_color_order_of_belts_in_karate.pdfIn PDF document text
    • http://wulutano.mywebcommunity.org/89791411710.pdfIn PDF document text
    • http://bamasadukarudam.iblogger.org/calculus_early_transcendentals_8th_solution_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/nisisepolo/u9ieTjj/11981350774.pdfIn PDF document text
    • https://cdn.sqhk.co/mugegiduveb/bGjhDhd/56801893857.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://konomugafal.epizy.com/varixuparo.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/avery_label_template_not_in_word.pdfIn PDF document text
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_1cbe7b815c8e41668a9c116d93c932b4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/awk_tutorialspoint.pdfIn PDF document text
    • https://73856814-13bb-4d44-aeaf-752cce6ba6bd.filesusr.com/ugd/a0d21a_9f27893913c94578b55ecb10dc69d8d9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/acknowledgement_format_for_college_assignment.pdfIn PDF document text
    • https://f395d2f2-f939-483b-815f-81062d4747ff.filesusr.com/ugd/be2697_c46a5b2d50514852ab3ad599675c2e55.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/59006915288.pdfIn PDF document text
    • http://laxiwezemew.epizy.com/20030137099.pdfIn PDF document text
    • http://suxanovovogemi.rf.gd/sifekevoper.pdfIn PDF document text
    • https://5e024257-ca51-40df-b6b5-a3104c7b7124.filesusr.com/ugd/97368a_03e4a65517034b6e8410efb1ee60aba6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gawabog/adobe_reader_english.pdfIn PDF document text
    • https://2178e3ec-2e0a-46e0-af35-d8a6fdfeb21a.filesusr.com/ugd/c411cf_7d8535ca572b4fe9861a10c9e8f5087c.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EE 5396 bytes
SHA-256: b729733622ef64215fdc2c13d4b2dcd4a70ea1a91804fdae3eb75903802b4786
font_01_sfnt_off00010637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10637 11704 bytes
SHA-256: 41445c3a9436bea13bbb34915395381a4f72e2fe032797585d360f85f4dd0066
font_02_sfnt_off00012ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBF 16140 bytes
SHA-256: 823b2e08162f201e5aa267b5f46f0dd5370182fcdc3b3b14e7c90b01b320e640

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