Malicious PDF — malware analysis report

Static analysis result for SHA-256 37749133afb73fe8…

MALICIOUS

PDF

80.2 KB Created: 2021-04-13 18:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1113bfd425b34e7862c7473ab7f79c76 SHA-1: f86b49d2664e0e0aa619b8a2cf11575c2914e0ca SHA-256: 37749133afb73fe815d00325ccbc381e1b2aac6fbc2b76a7c2853fa94025b63e
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to 'definition of state practice in international law'. No scripts were extracted, but the presence of external URIs and link farm characteristics strongly suggests the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/strik?utm_term=definition+of+state+practice+in+international+law PDF link annotation
    • http://koziwebakeru.iblogger.org/83032329385.pdfIn PDF document text
    • https://cdn.sqhk.co/sabiwizi/hjxhejb/crowd_drift_car_city_io.pdfIn PDF document text
    • https://posenumu.weebly.com/uploads/1/3/0/7/130776111/9770807.pdfIn PDF document text
    • http://austritkfa.com/what_is_the_most_accurate_translation_of_the_qurano4egp.pdfIn PDF document text
    • https://jimepozuzaz.weebly.com/uploads/1/3/5/3/135350414/sinavejafeda_veroxegow_gosakozilesura.pdfIn PDF document text
    • http://profyhouse.ru/canon_powershot_sx150_rechargeable_batteriesz1xty.pdfIn PDF document text
    • https://xawavefite.weebly.com/uploads/1/3/4/6/134667803/b039671.pdfIn PDF document text
    • https://nuvarimo.weebly.com/uploads/1/3/1/3/131378817/zujoj_ketuzigugilobav_daxinaxivegi_fonerepusuziz.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/hgggq6W/tiktok_creator_fund_payment_calculator.pdfIn PDF document text
    • https://cdn.sqhk.co/tobepeliv/FR7Reih/gasigo.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/hdtjagi/2833198742.pdfIn PDF document text
    • http://kidulukapaxarej.iblogger.org/facebook_blueprint_study_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://ridinodasifaji.rf.gd/payment_request_letter_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c338edc-4d5a-4adb-8df5-3b236001c4fc/57577392102.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/what_do_you_do_with_a_cyber_security_degree.pdfIn PDF document text
    • http://puwojewemuxa.epizy.com/86787315477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ef81da8-d552-4d71-ab95-24917b592485/podevulixozurojir.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/arun_gawli_daddy_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/river_flows_in_you_easy_sheet.pdfIn PDF document text
    • http://givinedefadedi.rf.gd/25569006245.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9B 4888 bytes
SHA-256: 9c714e9ea00113610cbba4f402fdc1221c6a53f9ac8c8a2715d4198121f0a61a
font_01_sfnt_off0000fe59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE59 10800 bytes
SHA-256: abb72c553c716b75f0c5a2ebd1de7bc5cb3ccbc9443385d637daf784e2fc7609
font_02_sfnt_off00012346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12346 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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