Malicious PDF — malware analysis report

Static analysis result for SHA-256 554eec7e00836c8e…

MALICIOUS

PDF

87.4 KB Created: 2021-04-14 12:04:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 343249b40b6c49419a0a599da51a68aa SHA-1: 4cf72a641555038015c9e93762056cba169825e8 SHA-256: 554eec7e00836c8e764f6c3d4a9f02e06b04e147b50705405230339cfb02a6d9
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed to manipulate search engine results. The primary malicious URL identified is https://lozipotod.ru/strik?utm_term=will+there+be+a+4th+maze+runner+book, which is likely used to redirect users to further malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://lozipotod.ru/strik?utm_term=will+there+be+a+4th+maze+runner+book PDF link annotation
    • https://cdn.sqhk.co/rorajakura/dge3Iuj/rarinu.pdfIn PDF document text
    • https://cdn.sqhk.co/tisewesir/fjpjcpY/31043830594.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465263/normal_605a650687f31.pdfIn PDF document text
    • https://cdn.sqhk.co/piwojosexaja/CuXwxif/speedometer_not_working_dodge_caravan.pdfIn PDF document text
    • https://cdn.sqhk.co/jevipugirofi/dhfzjjR/mopusamebetanomeloja.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/gjaae7B/revikewabufemuvorosu.pdfIn PDF document text
    • http://bibilewixan.iblogger.org/bach_classical_music_free.pdfIn PDF document text
    • http://rimenofosufativ.22web.org/jose_raul_capablanca_chess_fundamentals.pdfIn PDF document text
    • https://cdn.sqhk.co/jakatote/cgPx2Fj/sulitur.pdfIn PDF document text
    • https://cdn.sqhk.co/vutowogipu/5srK6ih/3929372759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384318/normal_605a0750e4c85.pdfIn PDF document text
    • https://cdn.sqhk.co/papovezegep/mxPXhjK/monster_breaker_hero_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392210/normal_601fef20da51a.pdfIn PDF document text
    • http://zusetuwegu.22web.org/box_plot_interpretation.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e754343-ffff-4b2f-965e-7ea4be4d1564/how_to_write_a_debate_on_any_topic.pdfIn PDF document text
    • https://83f018a0-8e49-44f0-b57e-805e464a5f06.filesusr.com/ugd/10a4aa_6630584b9de949e6a1a425f4f369cbe6.pdf?index=trueIn PDF document text
    • https://5a98ae10-8c7e-48da-b83f-9bcbc644cfa3.filesusr.com/ugd/9a8764_2865fdd2497b4bbda559b786bf457653.pdf?index=trueIn PDF document text
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_46c6c212aec0415c94fa30dfb481f875.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/83707424-eea0-47bb-b95a-ac8651281e59/algebra_1_practice_problems.pdfIn PDF document text
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_ab75b665c69640aaa1907d69dc49d980.pdf?index=trueIn PDF document text
    • http://tolibewi.epizy.com/62298432130.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CE 2960 bytes
SHA-256: d39960bfd59c8a79a39b2e6b8bca0fcf486de071cd3172157e94c5c67759f7f6
font_01_sfnt_off0000fc56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC56 5100 bytes
SHA-256: 5e62d418b106a40bd195ee7147181445b0a56084440b26fda1cbb44fd5e0be88
font_02_sfnt_off00010d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9A 12068 bytes
SHA-256: 18b5c8b7608574f7c2acb85eb656353a6364acbceec043778f374c6eb90a62c4
font_03_sfnt_off00013600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13600 17228 bytes
SHA-256: 813365cb695d7d846c87561b5419483de15ef94d682bacc13b33edff5ccafcbe

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