Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d87666ea3b1a65a…

MALICIOUS

PDF

78.6 KB Created: 2021-02-27 03:22:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7297415d5b1872f401dca38f846c4810 SHA-1: a9889cf285fe3499e2ac59d28820a9abd9b5971b SHA-256: 6d87666ea3b1a65addbc036c824679baaeb5e5a6f13220ee5c8d882a32ec4212
134 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains embedded URLs, one of which is a link farm designed to redirect users, and another points to a PDF hosted on disposable infrastructure. The heuristic 'SE_URGENCY_LURE' suggests the document uses deceptive language to prompt user interaction, aligning with phishing or credential harvesting tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://xajibur.ru/strik?utm_term=how+to+reset+whirlpool+gold+fridge PDF link annotation
    • http://fukuzowi.sportsontheweb.net/farijoletibupu.pdfIn PDF document text
    • https://sepuvomaxobaba.weebly.com/uploads/1/3/5/3/135311468/jadiwatisegoji.pdfIn PDF document text
    • http://tosety.xyz/lodopetojemojiwulurolodo66cep.pdfIn PDF document text
    • http://jabilevij.mypressonline.com/what_is_automatic_setting_on_slow_cooker.pdfIn PDF document text
    • http://lifeeuro.info/920882874943uga9.pdfIn PDF document text
    • http://specialsale.info/methods_of_environmental_and_social_impact_assessmentlflnr.pdfIn PDF document text
    • http://6gusevshop.space/bofijadejowudekunapubaxuj9lle.pdfIn PDF document text
    • http://ita-yog.space/2_player_soccer_car_gamesm9h93.pdfIn PDF document text
    • http://pannochki-art.com/korawuposewelopu41b6m.pdfIn PDF document text
    • https://sejumajofejopib.weebly.com/uploads/1/3/2/7/132740214/divewabuxefarosafuz.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwuwoki/yWgcHoH/depitidijuso.pdfIn PDF document text
    • http://ses-paypal.com/movies_hd_apk_for_ios1v1gb.pdfIn PDF document text
    • http://itchia.space/how_do_i_reset_my_motorola_phone1qae0.pdfIn PDF document text
    • http://dajexori.mypressonline.com/masterbuilt_30_digital_electric_smoker_recipes.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/how_to_change_paper_on_canon_p23-dh_v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lewinozed.atwebpages.com/96961745731.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_off0000f83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83E 5144 bytes
SHA-256: 11a2a6981b691dacfda561cb0e439326572541a08a61e46ca979a1787e7b8286
font_01_sfnt_off000109cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CD 10340 bytes
SHA-256: 64c180774ed3a0714ff3fec97655953edb83fc6b732f95dbeb7328c4c20fa735

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