Malicious PDF — malware analysis report

Static analysis result for SHA-256 0318f6bda1bd5afd…

MALICIOUS

PDF

72.8 KB Created: 2021-03-24 00:13:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c123867c95dfc073108c2d017496981 SHA-1: e8fcaa98b4d533ae72f9fdf65836f2544780d3cf SHA-256: 0318f6bda1bd5afd4252641a16e2d19e814f57a41bfa83a9f716d93c87dd750a
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to appear as legitimate search results. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. The document body, though heavily obfuscated, suggests a lure related to 'public limited company pdf'. No scripts were extracted, but the extensive use of external links points to a phishing or redirection attack.

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-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://mezovuduw.ru/award?keyword=disadvantages+of+public+limited+company+pdf
    • https://gabusuve.weebly.com/uploads/1/3/5/2/135297202/mimujowuwijifo.pdf
    • https://cdn.sqhk.co/fidapulano/FptZijI/detention_officer_hiring_near_me.pdf
    • https://gusemotasejodab.weebly.com/uploads/1/3/2/7/132741535/vetulifivopidu-sowin-fiditol-folibofuzozi.pdf
    • http://rolivazugatar.scienceontheweb.net/4779491651.pdf
    • https://dapapakutuluj.weebly.com/uploads/1/3/1/3/131384169/xomef.pdf
    • https://cdn.sqhk.co/nananava/hfhjanW/history_of_rap_board_book.pdf
    • https://cdn.sqhk.co/pozusonitid/hIhggeL/gsmarena_note_20_ultra_review.pdf
    • https://nirulutot.weebly.com/uploads/1/3/4/7/134700174/1043087.pdf
    • https://bugajujifupub.weebly.com/uploads/1/3/4/8/134894919/5493479.pdf
    • http://dexowowijovovu.iblogger.org/nofamuvukijubire.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ae8346f3-8f39-4ceb-8951-c86e2d707605/does_procreate_create_vector_images.pdf
    • http://pevogikuxupeja.onlinewebshop.net/94284323292.pdf
    • https://69f1164a-dcd3-4310-9fb4-3b67f03bdbb0.filesusr.com/ugd/9d7282_f5ce014c0b6d4a71ab20e252e52b17c5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/70d443b5-c06f-43f0-bbbf-28bd0352f7b9/tekize.pdf
    • http://jugexuwaluxanem.rf.gd/english_speaking_course_books_free_download.pdf
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_6ed26f47551a4198b3392b3486ce0586.pdf?index=true
    • http://beduxuluwuniva.rf.gd/biscuit_cookie_and_cracker_production.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000defc.bin
7eee51114a2eb8c34972b865d0cbeb3549be7efc2d139ff0d6ec1483e0e243f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFC 5680 bytes
font_01_sfnt_off0000f264.bin
5971731644aa11303a3a7c635dbc98d2adb7eb0c1a33093cdff3dce7b4b23165		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF264 10468 bytes

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