Malicious PDF — malware analysis report

Static analysis result for SHA-256 31710708929da0b6…

MALICIOUS

PDF

99.7 KB Created: 2021-03-23 01:27:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acef5d77ac9b922e600d87cb6cccbf10 SHA-1: 83b7e4a36463edd78fd5c45481c6bab51b76e0e7 SHA-256: 31710708929da0b6e848f58429f389c5a905ebe89698060c252d5dc6fe50d067
154 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a known malicious redirector. This heuristic, combined with ML classification and ClamAV detection, strongly suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to its creation, but no direct user-facing text that would indicate a specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yafferge.ru/wix?keyword=tribute+to+a+fallen+soldier+poem
    • https://cdn.sqhk.co/fekoguwiwu/d9icPhi/tower_defense_simulator_twitter.pdf
    • https://cdn.sqhk.co/gixelotopa/1iaieic/bounce_tales_game_download_apkpure.pdf
    • https://cdn-cms.f-static.net/uploads/4418579/normal_604d77c91d493.pdf
    • https://static.s123-cdn-static.com/uploads/4486563/normal_5fe1018a2f387.pdf
    • https://static.s123-cdn-static.com/uploads/4455886/normal_5ffa958cd89c0.pdf
    • https://cdn.sqhk.co/nerenina/Rii1nxN/vibopunorowojegonume.pdf
    • http://xeberul.mywebcommunity.org/wuvam.pdf
    • https://cdn-cms.f-static.net/uploads/4469828/normal_604333f08928c.pdf
    • https://cdn.sqhk.co/mawejoxejobe/MhfhaQL/dopamudukumuvido.pdf
    • https://cdn.sqhk.co/tosobulig/6YhiijA/30063575670.pdf
    • https://cdn-cms.f-static.net/uploads/4384320/normal_6032002ec9d68.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/a4f96ff9-e57f-4dfc-94ae-7686529ab5d5/what_is_calorie_in_chemistry.pdf
    • https://s3.amazonaws.com/tobobowu/graphing_linear_equations_with_two_variables_worksheets.pdf
    • http://gibonizurof.rf.gd/31603305185.pdf
    • https://uploads.strikinglycdn.com/files/5205c7e3-b2f7-487f-b331-1ee12de2392b/sudusenonipuxakuzulet.pdf
    • http://xujided.onlinewebshop.net/40781369403.pdf
    • http://tuxumojidozol.rf.gd/76130779323.pdf
    • https://uploads.strikinglycdn.com/files/b5e2e147-03a7-49cd-82d3-b9df94cd1620/93526142240.pdf
    • https://uploads.strikinglycdn.com/files/fc19fb1e-3663-450a-aa73-13d2e69206d9/laboratory_manual_for_introductory_chemistry_concepts_and_critical_thinking_7th_edition.pdf
    • http://peledopa.myartsonline.com/online_business_in_nigeria.pdf
    • https://uploads.strikinglycdn.com/files/c915d612-61a1-44aa-b4c2-92cbd950b05e/best_workout_equipment_for_home_reddit.pdf
    • https://s3.amazonaws.com/vidadaviwal/spotify_premium_mod_android.pdf
    • https://s3.amazonaws.com/fidefofudi/afzelia_africana.pdf
    • http://nesoruzesin.epizy.com/5310998023.pdf
    • https://s3.amazonaws.com/panalipolifod/pikirife.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000126fc.bin
5e89eb83653404ea97a88a6a0415ace40ca9014783dfff4eb3390bb44f64c684		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126FC 5160 bytes
font_01_sfnt_off00013857.bin
8546221612e42bf082385fcfcdc04d3ff0c1a910a473b36edecbc242a45c9749		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13857 5556 bytes
font_02_sfnt_off000148d1.bin
2b701d39b2914d795a33a4e005f5b2161b18db1579e8aebf35004aec784a8e43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148D1 11692 bytes
font_03_sfnt_off0001709a.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1709A 4324 bytes

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