Malicious PDF — malware analysis report

Static analysis result for SHA-256 3612a48dadded210…

MALICIOUS

PDF

83.0 KB Created: 2021-03-25 03:10:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8524d084f9521db3af8f9abaac2bfec5 SHA-1: c899937caf1c12fc9945cf960ed266910905469c SHA-256: 3612a48dadded210322b6a161b46b2a0db06f9bdb44aace863e1153de6227632
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution campaign. The PDF structure and embedded content, though partially obfuscated, are consistent with attempts to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://fokemale.ru/wix?keyword=as+per+your+request+short+form PDF link annotation
    • http://rojemop.iblogger.org/commercial_electric_multimeter_m1015b.pdfIn PDF document text
    • http://iblack.space/neato_botvac_d_series_error_3000i59ge.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwosexed/giecwKi/mtg_conspiracy_value_cards.pdfIn PDF document text
    • http://helplnstagramoffice.com/johannes_itten_the_art_of_color_downloadzafko.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/how_to_be_an_iso_9001_certification.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwuwoki/hf2dkeQ/circuit_training_workout_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/jawutuwek/he8hed7/bitcoin_wallet_app_android_free_download.pdfIn PDF document text
    • http://segaruzobuguses.scienceontheweb.net/cathode_ray_oscilloscope_cro.pdfIn PDF document text
    • http://batmbatm.ru/nudorojofojazamb6sby.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/OQVViah/91002884725.pdfIn PDF document text
    • https://cdn.sqhk.co/folikulezig/gfbgfTg/lovejoy_high_school_staff.pdfIn PDF document text
    • http://hydrofthol.space/pdf_binder_filehippoxq5ex.pdfIn PDF document text
    • https://cdn.sqhk.co/mibuguxinise/jebhagj/libisedu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381105/normal_6029ee0a205f5.pdfIn PDF document text
    • https://cdn.sqhk.co/muzolorakow/AhaihDV/tedikov.pdfIn PDF document text
    • http://pagexonani.iblogger.org/pufapebesisusogerovef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386073/normal_605b967579324.pdfIn PDF document text
    • http://taygerr.com/zetavisafaznos0c.pdfIn PDF document text
    • https://cdn.sqhk.co/rotonoba/hdijhgm/antiheroe_definicion.pdfIn PDF document text
    • http://metinozub.iblogger.org/box_room_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/jeChgeb/xuxokigijud.pdfIn PDF document text
    • http://ruwemipuwev.mypressonline.com/86007835178.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kepagewav.atwebpages.com/vipebitavegitinazo.pdfIn PDF document text
    • http://fodukenama.epizy.com/xubokipuwa.pdfIn PDF document text
    • http://suginuzebaluwom.rf.gd/eyeglasses_eps_vector_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E5 4844 bytes
SHA-256: d9ec25024b7d5a11720885f2b25dc3f76d1bbbb3399fde437fb6e1a224931b0a
font_01_sfnt_off00010a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A72 11664 bytes
SHA-256: 2d35159b944246c25bf53ab797b8501cc2962f3d2144030c385b11a3bdc89940
font_02_sfnt_off00013083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13083 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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