Malicious PDF — malware analysis report

Static analysis result for SHA-256 675f2094ba9ab474…

MALICIOUS

PDF

69.8 KB Created: 2021-03-20 17:32:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ffbb95a1e2c12bf376dd59bb8e9e7ff SHA-1: 2ccd7901033c71dd9a3edd1334c2ba9edf2c93bb SHA-256: 675f2094ba9ab4741af19308ce7d4c430f38274bbc82ec77adae8c36ba61500e
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing unwanted content. While no scripts were explicitly extracted, the nature of the PDF and the numerous external links point towards an attack pattern involving redirection to potentially malicious sites.

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://soxebez.ru/wix?keyword=all+supernatural+sigils
    • http://zevibeponakat.getenjoyment.net/important_days_and_dates_download.pdf
    • https://fofagova.weebly.com/uploads/1/3/4/3/134313529/femil.pdf
    • http://jiwabozaxexe.mypressonline.com/95196192838.pdf
    • https://kusafowagu.weebly.com/uploads/1/3/1/8/131871480/3a98834abf69fe0.pdf
    • https://jarofuzaduse.weebly.com/uploads/1/3/4/5/134502270/lavinegiwijim_xixumurokifajuj_kidarusitu.pdf
    • http://gamukanemafutu.mywebcommunity.org/the_gift_of_the_magi_vocabulary_worksheet_1_answers.pdf
    • https://tilifezazam.weebly.com/uploads/1/3/4/7/134763305/5a00bb28d.pdf
    • http://nawitebexu.medianewsonline.com/lobuvikafede.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/64de277c-59f9-44dd-bdde-27a528be16ec/how_to_bend_offset_emt_pipe.pdf
    • https://uploads.strikinglycdn.com/files/c94a556a-6a90-4296-858e-3b43b2aa6e2b/cast_of_power_book_iii_raising_kanan.pdf
    • http://baxewape.myartsonline.com/nekaxovolozememusimivuwi.pdf
    • https://uploads.strikinglycdn.com/files/d2646547-17ea-478d-8396-ee3a09028f71/whirlpool_quiet_partner_iii_not_working.pdf
    • https://s3.amazonaws.com/lovomijelun/import_stylesheet_in_css.pdf
    • https://uploads.strikinglycdn.com/files/b831e815-4797-4ee2-8d6a-293b4cccc17f/85377208174.pdf
    • https://s3.amazonaws.com/mukut/58966695947.pdf
    • https://uploads.strikinglycdn.com/files/1af53e10-c3eb-4cd7-b2bb-c4b87abc5c83/21741187899.pdf
    • https://uploads.strikinglycdn.com/files/4b8a2cae-5271-4f7f-8ab0-aab704915f67/76019270549.pdf
    • https://s3.amazonaws.com/tanikanaw/standard_form_equation_of_a_circle_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/915f36d6-12d5-460d-9c7b-14e6b29f6906/an_ember_in_the_ashes_film_release_date.pdf
    • https://uploads.strikinglycdn.com/files/f3154315-c28d-4f19-a2ce-e0e9926075a6/what_is_strip_cropping_in_agriculture.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_off0000d3dd.bin
72269e671725da8e039209ce1d92db5764e04b86900df601a5211cb8ee925ef2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DD 4976 bytes
font_01_sfnt_off0000e4d9.bin
a72d230aa410c4ca96fbfc681baddc6e71615a03afb69a0f7996c1e23a2b8397		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D9 11228 bytes

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