Malicious PDF — malware analysis report

Static analysis result for SHA-256 94873a83c8e0f160…

MALICIOUS

PDF

93.6 KB Created: 2021-05-26 06:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d14ea1f6ef1f53174d89c1755acf6f9 SHA-1: 2914c41922ce7f43598ddb36df8c5fbd3df5b1cd SHA-256: 94873a83c8e0f1601017d195dde5f9c7be7f761bca00b3b4889b95fdcda91bfa
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many of which point to PDF files, suggesting a link farm or redirection mechanism. The primary external URL, 'https://xezojetit.ru/strik', is likely used to deliver a malicious payload or conduct phishing. No scripts were extracted, but the PDF structure and numerous external links indicate a malicious intent to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xezojetit.ru/strik?utm_term=how+to+get+chisel+and+bits+mod+on+minecraft+pe
    • https://cdn-cms.f-static.net/uploads/4426549/normal_60511e353fdfa.pdf
    • https://static.s123-cdn-static.com/uploads/4455657/normal_5fe4105050c62.pdf
    • https://cdn-cms.f-static.net/uploads/4465938/normal_60368176de0d9.pdf
    • https://degubazof.weebly.com/uploads/1/3/5/3/135304991/rejaxevedudilevina.pdf
    • https://lorumotavur.weebly.com/uploads/1/3/4/6/134693112/1bbdd27f4dd0.pdf
    • https://faniwavuguvupos.weebly.com/uploads/1/3/4/4/134478403/jorupozum_nupugo_depad.pdf
    • https://cdn-cms.f-static.net/uploads/4481406/normal_601b337b39a91.pdf
    • https://static.s123-cdn-static.com/uploads/4368496/normal_5ffce1c3ab68b.pdf
    • https://cdn-cms.f-static.net/uploads/4366655/normal_5fd8580889dff.pdf
    • https://cdn-cms.f-static.net/uploads/4451208/normal_606d583b5401d.pdf
    • https://simisodiguguvig.weebly.com/uploads/1/3/5/3/135324772/wunajatedi-filutoko.pdf
    • https://cdn-cms.f-static.net/uploads/4450439/normal_6068cebd1bb3f.pdf
    • https://cdn-cms.f-static.net/uploads/4411001/normal_6016517b2a07f.pdf
    • https://cdn-cms.f-static.net/uploads/4479707/normal_60580bf760742.pdf
    • https://cdn-cms.f-static.net/uploads/4470688/normal_6024ed2fbe576.pdf
    • https://rozinezo.weebly.com/uploads/1/3/1/6/131636990/bejos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/bifadiwuwileji/arena_of_valor_chinese.pdf
    • https://s3.amazonaws.com/jajuzasalikirut/hp_designjet_500_printheads_not_functional.pdf
    • https://s3.amazonaws.com/jukezeluf/space_quiz_questions_and_answers_2018.pdf
    • https://s3.amazonaws.com/nisiwanolom/dimug.pdf
    • https://s3.amazonaws.com/dafumuxitupav/50320344512.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_off00012286.bin
39b055b8d31c3da2c62515a54075e4e18a16b04fc4a5cc45c1e7782670f4c5a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12286 5548 bytes
font_01_sfnt_off0001353e.bin
8ac949d5d080c8d89615346e354be06a2ee94c1f1d80f9a3eacea64f07e486ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1353E 10864 bytes
font_02_sfnt_off00015a37.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15A37 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.