Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e7d7bc3d52aabe…

MALICIOUS

PDF

72.7 KB Created: 2021-06-04 02:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9452d93671461f6406ce28a165336a0 SHA-1: d870827c8f801bbd4e30a38b2fcdfd4940db0e3f SHA-256: e2e7d7bc3d52aabe6b58697f9b591d41ac339ef98c904743aa55d62618af2d22
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm with numerous external PDF links. The primary malicious URL, https://pixomot.ru/pbw, is likely used to redirect users to further malicious content or phishing sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users through deceptive content, aligning with common phishing and malware distribution tactics.

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://pixomot.ru/pbw?utm_term=numeros+ganadores+de+mega+millions+texas
    • https://romubavopu.weebly.com/uploads/1/3/4/8/134884942/denimogax.pdf
    • https://ratewanevunexem.weebly.com/uploads/1/3/2/6/132681210/f6e9a5da96.pdf
    • https://mifanupomiseri.weebly.com/uploads/1/3/2/6/132681757/magipu.pdf
    • https://saxunerafoku.weebly.com/uploads/1/3/5/3/135312656/lizizabo.pdf
    • https://wanalupegekiful.weebly.com/uploads/1/3/4/8/134879682/vapodevuresaba.pdf
    • https://jajedasas.weebly.com/uploads/1/3/4/2/134234666/soxirebivom.pdf
    • https://lojijuzirikoza.weebly.com/uploads/1/3/4/5/134593465/3172789.pdf
    • https://guzaxogovi.weebly.com/uploads/1/3/4/6/134651677/lewapinom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://redejok.pbworks.com/w/file/fetch/144530040/ejercicios_de_sucesion_numerica_para_tercer_grado_de_primaria.pdf
    • http://sijomirurefi.pbworks.com/w/file/fetch/144460338/probability_and_random_processes_free_download.pdf
    • http://mumubib.pbworks.com/w/file/fetch/144414627/78988878861.pdf
    • http://puzavofan.pbworks.com/w/file/fetch/144579882/12409270041.pdf
    • http://jeselivid.pbworks.com/f/96040713147.pdf
    • http://xutosop.pbworks.com/f/87304424230.pdf
    • http://pejuzor.pbworks.com/f/beauty_and_the_beast_violin_sheet_music_with_letters.pdf
    • http://letonepamusi.pbworks.com/w/file/fetch/144436527/wutip.pdf
    • http://mujefapufefi.pbworks.com/w/file/fetch/144580128/kreisler_praeludium_and_allegro.pdf
    • http://vosebim.pbworks.com/w/file/fetch/144580044/understanding_your_college_experience_strategies_for_success_2nd_edition.pdf
    • http://negaboxa.pbworks.com/w/file/fetch/144447597/57651862192.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_off0000dc4d.bin
ea134da750fcf7caa6b92c0e08c12b367bd010346edc5cb71445b6ba2dd55371		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4D 5184 bytes
font_01_sfnt_off0000eddb.bin
02b1843c6a2f7d64d86d8826b77a474ad18f279768727062ff4cdd73b7683bc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDB 11596 bytes

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