Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f49f7a75f322332…

MALICIOUS

PDF

81.0 KB Created: 2021-03-29 23:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1cdb88095c641ba8e8365715cff9dc7 SHA-1: 790a93c11de6f9baa8160cb12918acc0a64a14d6 SHA-256: 4f49f7a75f3223324131bfd450f3e2de773e2e98859b5e12e8d5e8756c4daee0
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are associated with link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=what+is+literature+survey+in+research+methodology
    • http://tosety.xyz/blackmagic_atem_mini_software_updatepc6g3.pdf
    • http://xrootunited.com/14467662552x6jki.pdf
    • https://cdn-cms.f-static.net/uploads/4372987/normal_601f2cde5bb9a.pdf
    • https://cdn-cms.f-static.net/uploads/4384655/normal_602a31db7c96b.pdf
    • http://turekawetareju.iblogger.org/canon_mg3520_printer_setup.pdf
    • https://cdn-cms.f-static.net/uploads/4413702/normal_605cfdb9034a6.pdf
    • https://static.s123-cdn-static.com/uploads/4455195/normal_5feb497a01014.pdf
    • https://static.s123-cdn-static.com/uploads/4389570/normal_5fe13bde0ec34.pdf
    • http://pofizivor.22web.org/35927886156.pdf
    • http://tuwobezike.22web.org/lobusewawetuposovibixufip.pdf
    • https://cdn.sqhk.co/pifonode/NWheHie/steamer_clams_shipped.pdf
    • http://kikawogax.iblogger.org/medicine_wheel_template.pdf
    • http://dimax-matrasy.ru/27088351582l9gr5.pdf
    • https://cdn.sqhk.co/wotirixa/5bjddd2/50595416672.pdf
    • http://igcopyrightforhelps.com/jekezujewuxutapatuduwekepl7dty.pdf
    • http://narelavupes.22web.org/lazokagudipalazabulefewiz.pdf
    • https://cdn.sqhk.co/bebumila/9rjgE7o/ch_play_apk_cho_iphone.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/fuwuzerijofa/dosomiwomoteze.pdf
    • http://wowawese.rf.gd/panegosewuxiv.pdf
    • https://s3.amazonaws.com/vapite/80362003886.pdf
    • http://karatufi.epizy.com/antimicrobial_resistance_mechanisms.pdf
    • http://vanobibufasapes.rf.gd/diagnosis_of_entamoeba_histolytica.pdf
    • http://dopisudul.epizy.com/49518541671.pdf
    • https://s3.amazonaws.com/jupevuxirapi/zulurikotijatavimaz.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_off0000f116.bin
f85abf7842801b88fd2da9a302381711da6eb78671cdc36e0ec53985c666bdd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF116 5412 bytes
font_01_sfnt_off00010350.bin
1b8ba67cb841f43ff42dfadaeb8217fa3e4d719cd79f2e47bc2c8898dc415968		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10350 10784 bytes
font_02_sfnt_off00012821.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12821 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.