Malicious PDF — malware analysis report

Static analysis result for SHA-256 df72a84403be195e…

MALICIOUS

PDF

71.4 KB Created: 2021-03-14 13:12:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 97ac71781d399ed12e279b6c07e1b259 SHA-1: 3aa693a10b75c2fbeedfcc136790c3d8decbdca0 SHA-256: df72a84403be195e30dca861dd3544bede9153dc62e211e301c2739c68ba5e9d
126 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ML classifiers and ClamAV. It contains numerous embedded URLs pointing to external sites, with one heuristic specifically identifying it as a link farm on disposable hosting. The presence of external URIs and the overall detection suggest the PDF is intended to redirect users to malicious content, likely for phishing or to download further malware.

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://soxebez.ru/award?keyword=que+es+el+contexto+laboral+pdf PDF link annotation
    • http://ginutojuluxuvo.iblogger.org/21734191269.pdfIn PDF document text
    • https://cdn.sqhk.co/dopiporajen/PNWgj0L/fuxoromeduzaligezuvep.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/gihfWha/tiles_hop_edm_rush_game.pdfIn PDF document text
    • https://cdn.sqhk.co/xujanezujol/hfWjhb8/adverb_form_of_words.pdfIn PDF document text
    • http://kavademive.sportsontheweb.net/ca_foundation_time_value_of_money_formula.pdfIn PDF document text
    • https://cdn.sqhk.co/xewazezikufi/idgiSgi/square_bird_feeder_pole.pdfIn PDF document text
    • https://cdn.sqhk.co/fogunivugame/dhhxo7q/8th_grade_math_worksheets_word_problems.pdfIn PDF document text
    • http://dedigevobunobe.medianewsonline.com/vejokubovenibesozoruso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418185/normal_60242a97505c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373511/normal_604678c4c78ad.pdfIn PDF document text
    • http://malitaludim.iblogger.org/2190115835.pdfIn PDF document text
    • https://cdn.sqhk.co/kakapoxavu/46Mgjjg/wudawubufawojus.pdfIn PDF document text
    • http://fixadazopirutus.22web.org/around_the_world_in_80_days_film_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/vomikigiw/jgjahhF/14740771078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501791/normal_60236e73161d2.pdfIn PDF document text
    • https://cdn.sqhk.co/pimetezefo/QidgdFq/27126162907.pdfIn PDF document text
    • https://cdn.sqhk.co/leguzufaju/ijijeP8/57639835300.pdfIn PDF document text
    • https://cdn.sqhk.co/letopoto/jehghrx/47641055653.pdfIn PDF document text
    • http://wumomotetidofe.getenjoyment.net/what_is_literature_review_in_term_paper.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jisijuvod.myartsonline.com/lelir.pdfIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/gcse_french_grammar_checklist.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_off0000d9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B4 5420 bytes
SHA-256: bfe6246a16a5d8d510ad5b72f1056593a43e3f3ad3e5b0452f9151fa09eb2f2c
font_01_sfnt_off0000ec2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2A 11076 bytes
SHA-256: 592f8dfc6c20878be2d761debb8f93ec5fba73fb7ab7c7990b408fb4433d9d07

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