Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e7f8701957e5b7f…

MALICIOUS

PDF

87.6 KB Created: 2021-03-03 13:19:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4ac36fb5d15665adce17e5e330091cd6 SHA-1: b1bcc0111055b6cbdb77d1bba78c2dee1fac128c SHA-256: 2e7f8701957e5b7fc64a82631140506879d26681329d6e70e5253578dbb91b36
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to disposable hosting and are likely part of a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to facilitate phishing attacks.

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://kuzutuzo.ru/123?utm_term=what+is+the+summary+of+animal+farm PDF link annotation
    • https://cdn.sqhk.co/senuziker/egJygeL/lil_yachty_freestyle_funk_flex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459641/normal_602ed358a86f7.pdfIn PDF document text
    • http://modalidetefid.iblogger.org/anita_pallenberg_mick_jagger_performance.pdfIn PDF document text
    • http://sivelural.mygamesonline.org/will_titan_tips_fit_graco.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419191/normal_60341c4161dc1.pdfIn PDF document text
    • http://fuvisetitisenon.mypressonline.com/hp_elitebook_8540w_drivers.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/ifRjjjf/raxabilom.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/venstar_t2900_blank_screen.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/how_do_you_unclog_a_hoover_windtunnel_2.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/iepicgd/josobife.pdfIn PDF document text
    • http://kefipipina.22web.org/chemistry_chapter_10_test_b_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pevutedijubixit.epizy.com/animal_cell_structure_and_function.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/concierto_de_aranjuez_piano_reduction.pdfIn PDF document text
    • http://sivigowukom.epizy.com/baal_veer_episode_849.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/ribosomal_rna_database.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/79681513768.pdfIn PDF document text
    • http://sogurorirerew.onlinewebshop.net/bissell_vacuum_cleaner_belt_keeps_breaking.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C1 5124 bytes
SHA-256: 80be1ddce9e4a6be2fbd9b5cba301df225908d150aa8db3390071b129a0e78ec
font_01_sfnt_off00012a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A13 11584 bytes
SHA-256: 3436ea7693ab8e2aace3c421d27c373fb578c3148c153fa00158c1f99f9b33ed

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