Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e49bae9b55bc8a…

MALICIOUS

PDF

72.4 KB Created: 2021-04-17 07:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1deedcd0fd067aa3739015d04baca97 SHA-1: 6a6a5bedecd80ab858c6b63a9839d97807bb1e44 SHA-256: 54e49bae9b55bc8a755938a16c4fbc6d97dc7c0037b6e257fc85fa7d4d22118d
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains text related to "stats modeling the world 3rd edition answer key pdf", suggesting a lure to trick users into clicking a malicious link. The embedded URI points to a suspicious URL on botokaw.ru, which is likely used to deliver a secondary payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://botokaw.ru/strik?utm_term=stats+modeling+the+world+3rd+edition+answer+key+pdf
    • https://cdn-cms.f-static.net/uploads/4413845/normal_60180828339c1.pdf
    • https://dogaralezuj.weebly.com/uploads/1/3/1/6/131637140/8f3d54.pdf
    • https://static.s123-cdn-static.com/uploads/4491412/normal_5fed1b4d070d0.pdf
    • https://cdn-cms.f-static.net/uploads/4366665/normal_6060584541abe.pdf
    • https://dotowukigirer.weebly.com/uploads/1/3/1/1/131163902/bd0b94b8fa.pdf
    • https://kigadipokifexi.weebly.com/uploads/1/3/0/8/130813079/3427852.pdf
    • https://nisivijuwowog.weebly.com/uploads/1/3/0/8/130813757/1f9970abd.pdf
    • http://nupukenuba.iblogger.org/bissell_powerlifter_powerbrush_belt_size.pdf
    • http://bigmagazin.xyz/slave_harem_in_the_labyrinth_of_the_other_world_espaolartr6.pdf
    • http://armada.technology/80481652571tlkzx.pdf
    • https://cdn-cms.f-static.net/uploads/4489733/normal_605704ff07a32.pdf
    • https://mepolelo.weebly.com/uploads/1/3/4/6/134626310/povikidasibudo.pdf
    • http://kesisofawa.mygamesonline.org/what_does_direct_materials_price_variance_mean.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c3747221-b02c-40b9-921f-33e744ee3199/sajovikodepififisiwegile.pdf
    • https://uploads.strikinglycdn.com/files/f5f1c7bd-e5ce-4fcc-89fa-66955620caac/lafujumetevupegowuzujolog.pdf
    • http://woxesuguve.epizy.com/vurudugezajivuzukebanifiw.pdf
    • http://rexefobixavater.myartsonline.com/pdf_catalogo_avon_campagna_16_2020.pdf
    • https://uploads.strikinglycdn.com/files/9f0c6798-e464-4152-9c6e-c47d16111110/61216667492.pdf
    • http://madulok.epizy.com/31296401738.pdf
    • http://milebulijulami.onlinewebshop.net/17960848216.pdf
    • http://pazepoxi.atwebpages.com/45737052401.pdf
    • https://uploads.strikinglycdn.com/files/73c41f0f-58bc-408d-8710-bca25d61a82c/honeywell_t8000c_installation_manual.pdf
    • http://jopiwutipav.epizy.com/kuvajif.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_off0000db2c.bin
aba3bd6a9023713bde92a3ab6e49374e8345e5be7f5871c8e5e23e315da70d6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2C 5980 bytes
font_01_sfnt_off0000ef72.bin
4deddaa4e48d3c268f1ba4dc4b1a6ed7776cc0b785011ca59fc65fb754f63f8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF72 10080 bytes

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