Malicious PDF — malware analysis report

Static analysis result for SHA-256 79506603d120eb2a…

MALICIOUS

PDF

75.7 KB Created: 2021-03-18 00:23:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca568047f978bdb060e5e3a5af3e4c38 SHA-1: de36d0f98f46b221b15cdda009beff1b66532d3c SHA-256: 79506603d120eb2ac628817599b057b2c92d4a1d9f19fb0315ba9dceb9c4ae9f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, indicating a link farm or SEO abuse tactic, with the primary URL being https://jumiwimov.ru/wix?keyword=papas+louie+3+poki. The document body is heavily obfuscated and appears to contain metadata related to wkhtmltopdf, suggesting it was programmatically generated.

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://jumiwimov.ru/wix?keyword=papas+louie+3+poki
    • https://nabaladeso.weebly.com/uploads/1/3/1/4/131438379/jubov.pdf
    • https://zetejuxir.weebly.com/uploads/1/3/4/3/134338478/2008784.pdf
    • https://cdn-cms.f-static.net/uploads/4369911/normal_5fd85168ec237.pdf
    • https://manasowugarubib.weebly.com/uploads/1/3/0/9/130969960/saxamozevo.pdf
    • http://nixekagog.22web.org/32530385487.pdf
    • http://hook-up.fun/is_boy_in_striped_pyjamas_true_storyxff62.pdf
    • https://melugazeso.weebly.com/uploads/1/3/1/1/131164252/794f190.pdf
    • https://zefemebok.weebly.com/uploads/1/3/0/7/130775969/kisowigute.pdf
    • https://cdn-cms.f-static.net/uploads/4418184/normal_5fd1216e98f7a.pdf
    • http://normab-id.com/is_push_pull_legs_better_than_bro_split_for_masspr0ug.pdf
    • https://mimitokiwunas.weebly.com/uploads/1/3/4/0/134012498/lozikilewebusimoke.pdf
    • https://zonixaroponovan.weebly.com/uploads/1/3/1/3/131398400/8c120cd00.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://galikunulumofi.epizy.com/sopezolulimumurof.pdf
    • https://uploads.strikinglycdn.com/files/3cee3f12-58c8-4006-a8e2-90d76a9d7d8e/pikakotov.pdf
    • https://uploads.strikinglycdn.com/files/fa45a6e5-eafa-45ec-8a45-1ba4d9e11337/popegejadagukizisizaraz.pdf
    • https://uploads.strikinglycdn.com/files/8c45a6ea-5e38-422d-9280-05696c8bfb0a/93911018047.pdf
    • https://uploads.strikinglycdn.com/files/156c8c50-36cd-49d1-9e57-30bebabdf9d6/2008_honda_civic_ac_compressor_cost.pdf
    • https://uploads.strikinglycdn.com/files/1260ea28-30f8-45ad-9897-cbe2ab3e67da/kenmore_elite_washing_machine_drum_not_turning.pdf
    • http://poxizaxo.epizy.com/67987723355.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d267.bin
bea3d22743ddb7b1606d6c67835ed7fe38531439a9776d18262459d303549f3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD267 4948 bytes
font_01_sfnt_off0000e349.bin
d8d9a3226bd0ed64f71229e1d88ec2c714ca65379531f6e6abcb19acffa22145		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE349 9860 bytes
font_02_sfnt_off0000febb.bin
e129441376e423d59bfae907059ba008aeb431a6e5a90f1bc0a241313862e6d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBB 10136 bytes

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