Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d30f12c22ac493…

MALICIOUS

PDF

85.9 KB Created: 2021-03-21 21:02:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01a2e133e8cab8739a3c93621df53d13 SHA-1: 27de5895bb88ff5c8a7eb083471c31eea85ff36e SHA-256: 08d30f12c22ac49393b96e6c12062a82b053aa965911f301280f30e1e64711e9
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to drive traffic to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://bologen.ru/wix?keyword=naruto+blazing+mod+apk+2.26.0
    • https://lijepaxo.weebly.com/uploads/1/3/5/3/135324298/4536593.pdf
    • https://sikediluselifa.weebly.com/uploads/1/3/1/6/131636826/nedaxiruvov.pdf
    • https://cdn-cms.f-static.net/uploads/4483349/normal_604bb0410cbb6.pdf
    • https://cdn.sqhk.co/nivatasob/hjvLhhh/air_control_tower_games.pdf
    • https://cdn.sqhk.co/ratevusur/jH1iiD3/mufidezovunumepasumo.pdf
    • https://vabeluzaxudi.weebly.com/uploads/1/3/4/8/134884936/wezirorata.pdf
    • https://pukokisawar.weebly.com/uploads/1/3/4/7/134749025/tixiwuja-kufodu-nudowoda.pdf
    • https://cdn.sqhk.co/wirowanorax/Rjc0Nje/zorawazititim.pdf
    • https://cdn.sqhk.co/vopofuxo/HQZifQ4/turbo_stars_game_mod_apk.pdf
    • https://wupebeziwemipi.weebly.com/uploads/1/3/5/3/135315897/851b260c7fc.pdf
    • https://lumewogomor.weebly.com/uploads/1/3/4/3/134319436/2654245.pdf
    • https://cdn-cms.f-static.net/uploads/4424645/normal_601bc46c43c6f.pdf
    • https://tabureribe.weebly.com/uploads/1/3/0/8/130813037/7170387.pdf
    • https://gerogebu.weebly.com/uploads/1/3/1/6/131637886/5546204.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tokudapele/kenmore_chest_freezer_model_253_basket.pdf
    • https://s3.amazonaws.com/ditiruz/flower_art_design_images.pdf
    • https://s3.amazonaws.com/jagux/kubufatizuzu.pdf
    • https://s3.amazonaws.com/latufenaw/jezobewudaken.pdf
    • https://s3.amazonaws.com/zevutebulaworel/wednesday_weather_report_hourly.pdf
    • https://s3.amazonaws.com/lixasifasi/how_do_you_forgive_yourself_for_the_unforgivable.pdf
    • https://s3.amazonaws.com/tobojelusiwi/88526512179.pdf
    • https://s3.amazonaws.com/pulavokaxe/32349042494.pdf
    • https://s3.amazonaws.com/boduxatavepe/3d_moving_wallpaper_for_android_mobile.pdf
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0c2.bin
a28fcc4ba65d8171a55e8b87d646ac5d1dd213f66ab2b0026fd39e5ca5d32d1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C2 2900 bytes
font_01_sfnt_off0000fb04.bin
fadf29b26f61f181bd2e41b2c83a211632bf49134a7fdc70a36e907fafed531f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB04 5784 bytes
font_02_sfnt_off00010eb3.bin
fc32f59bc70288650592be429d514959cadb6e6cda3357a907d352c65692fd29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB3 10892 bytes
font_03_sfnt_off00013441.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13441 16204 bytes

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