Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df627495c671e1c…

MALICIOUS

PDF

72.0 KB Created: 2021-04-05 03:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3db894e3eba7651e2e7868b17c1e46d SHA-1: 7b3dc567ea72305196ac171bbd1f28ac04121404 SHA-256: 0df627495c671e1ce94d3971d44af7b8156123eeb67f8eb7aa34731e3bcb0482
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to deliver malicious 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://xezojetit.ru/aws?utm_term=qualitative+research+%2526+evaluation+methods+integrating+theory+and+practice+%25284th+ed.%2529
    • https://biwizodem.weebly.com/uploads/1/3/4/6/134650183/3548519.pdf
    • http://creditscoretracking.info/664096221108zymn.pdf
    • http://buzadur.22web.org/braunwald_cardiologia.pdf
    • https://tubolapibakosi.weebly.com/uploads/1/3/4/8/134872187/laliwexatovibenofa.pdf
    • http://pixell.store/customer_journey_map_template_google_slides920lj.pdf
    • http://mukinokelek.mygamesonline.org/core_workout_plan.pdf
    • https://vezinamitin.weebly.com/uploads/1/3/5/9/135984824/9220712.pdf
    • http://menesoger.iblogger.org/acey_deucey_rules.pdf
    • http://velixone.66ghz.com/autobahn_map_omsi_2.pdf
    • http://wuvevaj.iblogger.org/auxiliary_verb_lesson_plan.pdf
    • http://moneyindia.site/the_amulet_of_samarkand_movieey217.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gepivefukusi.atwebpages.com/44971863239.pdf
    • http://vazegazu.epizy.com/14890038058.pdf
    • http://fuxunowelujuxa.atwebpages.com/59146872657.pdf
    • http://giraxajo.epizy.com/which_country_has_the_highest_living_cost.pdf
    • http://pulizot.rf.gd/78840614046.pdf
    • http://laxuzoto.onlinewebshop.net/arquitetura_militar_definicion.pdf
    • https://uploads.strikinglycdn.com/files/e7a6d913-2a9e-457b-a1ed-97b9f287e181/personal_statement_for_university_examples_chemistry.pdf
    • https://uploads.strikinglycdn.com/files/1a1979ff-133f-4829-96ad-8aa34bb8801c/81267569340.pdf
    • https://uploads.strikinglycdn.com/files/f875d6ff-ce50-4719-be8c-10c51ba1dc47/2015_lexus_gs_450h_f_sport_for_sale.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbfb.bin
18f5f507f054a4088558714ea0b2a2757a288175f07e3fd8ffd65d3224c8f424		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFB 5008 bytes
font_01_sfnt_off0000ed01.bin
96d859b7b42a817d1d00fc9074512d883b712f7f9d2f938411c6fe18ba2334d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED01 11180 bytes

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