Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6270a96963423b0…

MALICIOUS

PDF

76.0 KB Created: 2021-05-06 03:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: df7ddc51aa7e22b7ca1ea2ceb66e1d2f SHA-1: 9c12cd4a20f95e280d273af1cc6afaba3f3f5cd4 SHA-256: c6270a96963423b0187194bf3fd7c9b5ed10ce4f5f733408b6969406f1105682
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or link farm attack, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The document contains numerous external links, including one to 'dugedepap.ru', likely intended to direct users to malicious or deceptive content. The ML classifier and ClamAV detection further support its malicious nature, flagging it as a phishing-related threat.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/wb?keyword=dell%20optiplex%209020%20mini%20tower%20motherboard%20specs PDF link annotation
    • http://mogoxopedutisaw.iblogger.org/easter_addition_and_subtraction_worksheets_for_kindergarten.pdfIn PDF document text
    • http://bowabemolova.22web.org/83556798193.pdfIn PDF document text
    • http://vulefuxudonad.22web.org/vuwoxukuro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_f5b84eb2da7b4a98997a10cb2b7ef068.pdf?index=trueIn PDF document text
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_b0b07c56cb804fa1968d31e21d2dba0e.pdf?index=trueIn PDF document text
    • http://kowewewabozete.epizy.com/best_computer_for_wow_ultra_settings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dce36c36-13af-41ee-9a37-6373a6e754f1/11389047865.pdfIn PDF document text
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_34661dc54a4e427bb124ee24cc0eb596.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/daa970e9-4cfd-4db9-8a19-fd8720722916/why_do_we_use_callback_function.pdfIn PDF document text
    • http://diwukimip.epizy.com/canon_eos_750d_manual_svenska.pdfIn PDF document text
    • http://tefinavi.epizy.com/56411622374.pdfIn PDF document text
    • https://e33362eb-94ba-4427-a888-6f4863169a18.filesusr.com/ugd/36ce96_d73d4a1d66b84fa7a065ffe9e87bf3bf.pdf?index=trueIn PDF document text
    • http://tilixufevoj.epizy.com/project_deliverables_document_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d7bc2e8-a55a-46e4-8f90-aadc7688e5f0/tebutaxusu.pdfIn PDF document text
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_96be455ff66d4ec684b87bdf1c2e19e8.pdf?index=trueIn PDF document text
    • https://5e3b32e6-a537-4a58-a531-ef303a468713.filesusr.com/ugd/120874_5a8e669f605442468f59c2c6ef89d346.pdf?index=trueIn PDF document text
    • https://86a9da1b-0b57-4b35-a77a-523886b904cd.filesusr.com/ugd/0d9a50_571251bdd26b4998b4e58deecc27fc0f.pdf?index=trueIn PDF document text
    • http://wipitawakewemex.rf.gd/45371043615.pdfIn PDF document text
    • https://2eeb51df-07ba-4372-80d9-1ef4646fc7f7.filesusr.com/ugd/6af210_8a24288b6739437dab34a813f0b4c14e.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE986 6040 bytes
SHA-256: 4f1b322b1a1a01d2c69cc9bd712d2dad4c000933358f2c132ad817c1f6d1b5d7
font_01_sfnt_off0000fdfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFE 10708 bytes
SHA-256: 2389990fe9104537919c2bce5eb90c53201830894da4ef6f6b1461c73db247ae