Malicious PDF — malware analysis report

Static analysis result for SHA-256 029022a40ac4298c…

MALICIOUS

PDF

129.1 KB Created: 2021-03-19 21:55:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: fade17921ae87c4bbdf3216e04bb5fb4 SHA-1: 189a8b5a5d080deb3c8eb458e1cf076b4f864288 SHA-256: 029022a40ac4298c914962136d913f4b3e80ff240af335eb12b16edc7b3d3226
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to contain keywords related to technical documents, likely as a lure.

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://midufefew.ru/award?keyword=fundamentals+of+communication+systems+solutions+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4494891/normal_5ffab8fef3693.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470014/normal_60079fa9d3c31.pdfIn PDF document text
    • http://wunegaxuduru.22web.org/2005_cadillac_cts_for_sale_in_saskatchewan.pdfIn PDF document text
    • http://sunufosabupes.scienceontheweb.net/98385596655.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420470/normal_6042fe5b6df88.pdfIn PDF document text
    • https://cdn.sqhk.co/diwiporeb/IsjfhiT/horse_riding_tales_ride_with_friends.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/habitual_buying_behavior.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490377/normal_604faf7e1cd96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407983/normal_5fe270c92ffe1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391314/normal_60249d1ec5db2.pdfIn PDF document text
    • https://cdn.sqhk.co/xewumoxu/XKij9hd/lenovo_ideapad_l340.pdfIn PDF document text
    • https://cdn.sqhk.co/tetaxekumipi/QHxniil/blue_cross_blue_shield_federal_2021_rates.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/Wk8hhqj/sheldon_whip_app_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/hegegcQ/yellow_soulier_sport_femme_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/nugizape/uAjbia0/photogrid_video_pic_collage_maker_photo.pdfIn PDF document text
    • http://pukitifafizeba.mywebcommunity.org/22841197387.pdfIn PDF document text
    • https://cdn.sqhk.co/nojebimit/cnz6ifa/tnt_mod_new_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405193/normal_5fd6771bb638d.pdfIn PDF document text
    • http://xajifefule.iblogger.org/20032141616.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lavavoju.rf.gd/front_back_app_free.pdfIn PDF document text
    • http://zidazimimaf.epizy.com/lefujenijurevulege.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19310 5260 bytes
SHA-256: 9461d3517454220adfa4c1951fe682c665b49fbd56c480c1762a8d9f531f818c
font_01_sfnt_off0001a4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4FB 16676 bytes
SHA-256: ae0597737115a509872a0fad2642c34233c30719bd60460f58405884ff7bdf5e
font_02_sfnt_off0001daf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DAF9 16968 bytes
SHA-256: c6addc326c3ad5bb8cd57f181dc8517045200ae3cac81b966303521de6124297

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