Malicious PDF — malware analysis report

Static analysis result for SHA-256 0606e503acbcc0e5…

MALICIOUS

PDF

67.6 KB Created: 2021-03-01 22:43:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e0c3ddcf0dfea26d0c09e6395955876a SHA-1: ce91244d9efc63e3c76dadc3c61c79cbc075a404 SHA-256: 0606e503acbcc0e5b2d6f841eb5185bd89d8f92379261fe439a66c6c1a18ab15
126 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, indicating a phishing or malicious intent. The PDF contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. The document body, though heavily obfuscated, contains text related to salaries and application details, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/strik?utm_term=average+salary+for+safety+specialist PDF link annotation
    • http://barcaporirternet-interbank-pe.com/48902283337shkgo.pdfIn PDF document text
    • http://kulanefimolon.mypressonline.com/spider_man_daily_comic_strip.pdfIn PDF document text
    • http://folugomobok.getenjoyment.net/vomat.pdfIn PDF document text
    • http://sexugaweguko.iblogger.org/sukeborobod.pdfIn PDF document text
    • http://twirlini.com/medieval_2_total_war_kingdoms_teutonic_campaigng0il5.pdfIn PDF document text
    • http://avtoshkola-region26.ru/98142585322v4qyu.pdfIn PDF document text
    • http://vseti.life/ragifagezolobobeggk74g.pdfIn PDF document text
    • http://katipef.medianewsonline.com/fedex_tracking_number_example_on_label.pdfIn PDF document text
    • http://lorewipa.scienceontheweb.net/5338506064.pdfIn PDF document text
    • http://pupezawat.scienceontheweb.net/bissell_spot_clean_proheat_pet_portable_carpet_cleaner.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/how_do_i_get_subtitles_on_my_samsung_remote.pdfIn PDF document text
    • http://repair-kompov.ru/sorifebevawupinaduzuse4i97g.pdfIn PDF document text
    • http://natorg.fun/39776354452bcb50.pdfIn PDF document text
    • http://trokot-shopnew.online/38886436516x0yxa.pdfIn PDF document text
    • http://thedefenseforge.com/61257969096vtld2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bexopikirekide.rf.gd/72525524870.pdfIn PDF document text
    • http://xixitaxizowana.epizy.com/naming_ionic_compounds_practice_problems_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/pubatukopejojavulumagur.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/lakire.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/fukupamijekuvemagan.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/25814685340.pdfIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB4E 5336 bytes
SHA-256: 7b6a318dd73f20d25b0771895945a7633f3d5aa9fc3c74481b84a3d2a889e69c
font_01_sfnt_off0000dd9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9A 10400 bytes
SHA-256: 323e3e6b9a14e40aa5012a8696f275277ead25bcf4421e7acd03b9ef3ba69da8

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