Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f6814f84b7c00f9…

MALICIOUS

PDF

82.8 KB Created: 2021-03-11 22:02:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d02da38cb7508ecc5be2ce7709363f66 SHA-1: c9366a44223460a2788bb1ebf37371f1a822c409 SHA-256: 0f6814f84b7c00f9f4e05e0a9e6b1f8807ac6b8f015e041b8247a804c4ffc02e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains a large number of external links, suggesting a link farm or phishing campaign. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly indicate the intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/strik?utm_term=black+and+decker+corded+lawn+mower+mm2000
    • http://xunarepozufuz.mygamesonline.org/furinno_abbott_corner_computer_desk_with_bookshelf.pdf
    • https://cdn.sqhk.co/zanotunuzi/uYicvij/jurassic_dino_water_world_mod_apk_unlimited_money.pdf
    • https://cdn.sqhk.co/totafeta/f7hg8wU/xenerewodetusa.pdf
    • https://bixagitiwor.weebly.com/uploads/1/3/4/6/134618264/4691677.pdf
    • http://fexevewuli.mypressonline.com/relationship_between_assets_and_liabilities_in_balance_sheet.pdf
    • https://cdn.sqhk.co/mugodetutag/ea2ge27/90101618192.pdf
    • https://cdn.sqhk.co/godezixibufo/ehbGhhl/91731876366.pdf
    • https://pafovawulawagi.weebly.com/uploads/1/3/4/5/134581771/8859390.pdf
    • https://cdn.sqhk.co/fimegasaz/hikQice/one_true_god_religion.pdf
    • https://ziluxofizavamo.weebly.com/uploads/1/3/6/0/136009732/4705536.pdf
    • https://gapefupekud.weebly.com/uploads/1/3/1/8/131871489/6be1299.pdf
    • https://cdn.sqhk.co/zarifabidit/iiaggMr/roxesalezowu.pdf
    • https://cdn.sqhk.co/nimuxugemu/bjbibjg/farikuguvizutomaja.pdf
    • https://jegivobepumo.weebly.com/uploads/1/3/4/4/134444156/jomokuxodezogi-mixavom-defozinupibomi-xusokiwel.pdf
    • https://luroxonigin.weebly.com/uploads/1/3/1/4/131406321/zorulolisavakumoxu.pdf
    • http://kavakedego.scienceontheweb.net/the_best_of_me_dawson.pdf
    • https://rokumewa.weebly.com/uploads/1/3/4/5/134529377/942a0653f.pdf
    • https://cdn.sqhk.co/tezizejaropu/ja5jiji/virtual_explorer_space.pdf
    • https://tawigijonepoter.weebly.com/uploads/1/3/4/0/134012415/tewugitugire.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106cb.bin
c51592dd6c8c346652c455b7f7df6995b14929660f7a68eb3c805c40a7c75202		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106CB 5388 bytes
font_01_sfnt_off0001191c.bin
60ce1eab1b58b271310b05b121f36bb927dee3314f23864586d557433854b485		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1191C 10884 bytes

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