Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c3d199fed415e2b…

MALICIOUS

PDF

83.5 KB Created: 2021-04-27 19:35:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffb664564bd8abaf013bcb80a1f6b419 SHA-1: b23368bc4f4d219e7b568e361995fe9b83a5e6cb SHA-256: 3c3d199fed415e2b00dff531cae1fc841203e5cb5b6542ca31d7b06da7ee7039
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to redirect users to potentially malicious sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/strik?utm_term=is+tone+it+up+protein+healthy
    • https://dofemavuxowag.weebly.com/uploads/1/3/0/7/130739836/jakejix.pdf
    • http://kulanonalum.iblogger.org/93343191700.pdf
    • https://cdn.sqhk.co/noviraxat/jgfkhih/sling_kong_cheats_apk.pdf
    • https://cdn.sqhk.co/jalosemuv/3AyLnji/nike_windrunner_jacket_black.pdf
    • https://cdn.sqhk.co/difixoruze/ifghjgk/hive_blockchain_stock_forecast.pdf
    • https://cdn.sqhk.co/tajiwikiter/amihXxY/hockey_goalie_equipment_drying_rack.pdf
    • https://cdn.sqhk.co/nunexijezep/igigpy2/powipudafagojaki.pdf
    • https://cdn.sqhk.co/surikuzezun/fEghhas/knights_of_ages_leveling_guide.pdf
    • https://cdn.sqhk.co/vikojovowoso/jbCAgib/dufovisivitemut.pdf
    • https://dixevivoruze.weebly.com/uploads/1/3/1/4/131437918/vobomamikulinez_gukiweg.pdf
    • https://cdn.sqhk.co/vuzefegevo/gjbnibO/80752218.pdf
    • https://devoporerok.weebly.com/uploads/1/3/1/6/131607733/130c6e61b.pdf
    • https://gajaxaja.weebly.com/uploads/1/3/2/7/132712369/3084458.pdf
    • https://cdn.sqhk.co/gusisitixinu/dhcEgcJ/47481770814.pdf
    • https://cdn.sqhk.co/piwuzuberaze/i3JbuZR/55934302745.pdf
    • https://natatujefeni.weebly.com/uploads/1/3/1/6/131607075/27b3db7fd4c6ecb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/cc82447a-2ae9-4ed6-b50a-22a111345284/93483702783.pdf
    • https://uploads.strikinglycdn.com/files/b97b81d5-eed3-4597-9719-2abff0951def/difference_between_gdp_per_capita_and_average_income.pdf
    • https://cff07a16-13b2-455b-8a78-148a75b158b4.filesusr.com/ugd/cda0c7_b3e0d6da2bc5447e96f3135bedc07af1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/85f33a16-a6cc-4513-9324-0dfdcefba19f/serato_dj_pro_macbook_air.pdf
    • https://143c7e3e-1a56-4739-9c24-5aac26b0263b.filesusr.com/ugd/28d7c1_fe75bdd0ac344d5ea7d6b326863d365f.pdf?index=true
    • http://tuxusajef.rf.gd/modeli.pdf
    • https://c31d65df-273c-4bcc-acfb-7b03b0724b99.filesusr.com/ugd/e7e4a0_299dccf4d92845c888fafc93e091ebae.pdf?index=true
    • https://6f12065f-c45d-410c-b048-6ec23fb2b810.filesusr.com/ugd/02ccf7_0f26fe9e562e468aa288576acffeeb24.pdf?index=true
    • https://a8a70d16-e3f0-4805-b115-4d8c62c40b57.filesusr.com/ugd/82e28d_d66f6d6ba70248b19c6f68985f5ab995.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a966cd9c-c705-44a6-9c79-f41dfc4940ad/95906435824.pdf
    • http://kuxixatizoxop.epizy.com/figegoxudubudujetavumotiz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd1a.bin
a015b4703030597f67cd80cb3eceda2c6950ef3db115ac1a140de90c7c929d5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1A 4828 bytes
font_01_sfnt_off00010d77.bin
05ed40acffdae4af36d11c3fc71001da9e118a1e6ad937028a5bd8db3d6c56f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D77 10708 bytes
font_02_sfnt_off000131ff.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131FF 4324 bytes

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