Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b7c68014e53cd0…

MALICIOUS

PDF

69.8 KB Created: 2021-03-14 11:21:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 78ab178fe7937df1e8a7f09b641abdfd SHA-1: 99753212acd552da294aa73d0ef932626f422437 SHA-256: 60b7c68014e53cd02546c4af948fba694f23acf05227000886ccbec75020d015
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 prominent URL pointing to 'nipisod.ru' which is likely part of a phishing or malware distribution scheme. The presence of external URIs and link farm characteristics suggests an attempt to redirect users to potentially harmful content.

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://nipisod.ru/award?keyword=tecnolog%25C3%25ADa+de+las+centrales+termoel%25C3%25A9ctricas+convencionales+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384632/normal_5ffbe0cdc8bc5.pdfIn PDF document text
    • http://upsbox.ru/android_folder_url35wcs.pdfIn PDF document text
    • http://fredo.bike/king_joffrey_wife_game_of_throneshv8wl.pdfIn PDF document text
    • http://good-production20.site/retro_frog_welliesdsf7v.pdfIn PDF document text
    • http://summer-italy.fun/el_caballero_de_la_armadura_oxidada_movimiento_literario7pt3x.pdfIn PDF document text
    • http://lovotilowojixo.iblogger.org/56405090235.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445118/normal_5ffd7e1d424b9.pdfIn PDF document text
    • http://idealslimitalia-ufficiale.site/abrsm_grade_5_sight_singing_practiceq82y3.pdfIn PDF document text
    • http://logemopi.22web.org/ehsaan_qureshi_video_song.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vapovalexuma.epizy.com/junogiromodu.pdfIn PDF document text
    • http://burafidofa.epizy.com/dilations_worksheet_kuta.pdfIn PDF document text
    • http://sadesepipo.rf.gd/sigudeneri.pdfIn PDF document text
    • http://jivatufuwofed.rf.gd/organic_compounds_containing_nitrogen_class_12_ncert.pdfIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_a3e2a4c69e8040a6b088827a19ee87f5.pdf?index=trueIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_c33b462fe94543498a3004dae512d437.pdf?index=trueIn PDF document text
    • https://ff0b3df2-dc61-4aeb-9024-93fa9b5bc175.filesusr.com/ugd/aa14a9_e91a5c01c5964b4599c36e3751c64bdf.pdf?index=trueIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_bad3950e3a1a4fe29d7658cd259a9a26.pdf?index=trueIn PDF document text
    • http://fepevakadiw.rf.gd/xoxiguwilezizajava.pdfIn PDF document text
    • http://tozubisifaxojof.rf.gd/tavesemubevisasuxige.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_off0000d05d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05D 5680 bytes
SHA-256: 8ae37ef1ba4eef984298734ec65b9f0073ee4b8e15b767b1a305f3f5b42713bb
font_01_sfnt_off0000e35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35B 10796 bytes
SHA-256: 687d59ff7def8ab04062bb1f741050f8dab11b82e9e941cf0c518ceb828acae1

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