Malicious PDF — malware analysis report

Static analysis result for SHA-256 74406e6eb42000ad…

MALICIOUS

PDF

72.6 KB Created: 2021-04-02 22:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b54f23ce4cadb42b3f0448c5cb1ab86 SHA-1: 791448dd34ae3b8cf918fccc8b7953be32161904 SHA-256: 74406e6eb42000adda492b63728bf4cb9e252ceabdf96aac5b51e888b626330e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning model as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous external links, many pointing to PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The presence of embedded URLs and the overall structure strongly indicate an attempt to direct users to malicious websites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/award?keyword=cambridge+test+ket+pdf
    • https://katebobuwusa.weebly.com/uploads/1/3/1/3/131384636/3607931.pdf
    • https://suwesinorilofev.weebly.com/uploads/1/3/4/0/134096988/mujebegojalonen_katitano.pdf
    • http://rusewigojubilon.mygamesonline.org/games_compatible_with_logitech_extreme_3d_pro.pdf
    • https://cdn-cms.f-static.net/uploads/4422879/normal_602cdc2a0c2d7.pdf
    • https://static.s123-cdn-static.com/uploads/4366369/normal_5fcb12a3f3849.pdf
    • http://gumidaz.medianewsonline.com/the_biggest_loser_fitness_program.pdf
    • http://xinuvaro.sportsontheweb.net/1726008314.pdf
    • https://vosuxawa.weebly.com/uploads/1/3/1/1/131164537/a92743f36535de.pdf
    • http://mamuxorap.getenjoyment.net/beauty_s_kingdom_anne_rice.pdf
    • http://korixoludofuguk.scienceontheweb.net/potato_late_blight_disease.pdf
    • https://zemedabumudog.weebly.com/uploads/1/3/2/7/132712209/vekerilezag_kewivomexukifa_kebinorivugibe_jokijebikakopa.pdf
    • http://tixanijematewe.mypressonline.com/100_adjetivos_en_ingles_y_espaol.pdf
    • https://static.s123-cdn-static.com/uploads/4383446/normal_5ff653be7c2eb.pdf
    • http://jawunefuda.mygamesonline.org/shl_logical_reasoning_test_with_answers.pdf
    • https://cdn-cms.f-static.net/uploads/4375088/normal_5fdb9fa34b8a7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://kewevagisugimuw.onlinewebshop.net/48080405360.pdf
    • https://s3.amazonaws.com/sewamos/autocad_2007_tutorial_floor_plan.pdf
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_b7bf26ef5e4a48858e633d02b3821cc0.pdf?index=true
    • https://s3.amazonaws.com/xetasif/25861243489.pdf
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_fb1c853e106747aa89cda82efca6d885.pdf?index=true
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_47b7aad1d21148d3a0b5da8e8d276681.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd6e.bin
8282f57218077c1cc30faf29aae8aabb91223b6fcd50fe543aaa6df2b01ec4dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6E 5128 bytes
font_01_sfnt_off0000dee9.bin
4e0bbad18b319dc5fb03a16ad5dd7efaa041e553143024619aefd96976a8ec7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE9 11936 bytes
font_02_sfnt_off000105d7.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105D7 4324 bytes

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