Malicious PDF — malware analysis report

Static analysis result for SHA-256 e53bc3322df24cfa…

MALICIOUS

PDF

171.8 KB Created: 2021-04-03 14:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9719ee0b508e790ed706851f3b0496ad SHA-1: 2bb9d24d068e2bc9277fd892bde568d825cf7636 SHA-256: e53bc3322df24cfa7cdc6fe3ef7c946737502f26ae79348225a4b7a78a233a71
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely to host a malicious payload or phishing content. The document body, though heavily obfuscated, appears to be a lure related to educational theory, suggesting a social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/aws?utm_term=john+dewey+theory+in+the+classroom
    • http://esparks.ru/diary_book_reportxq5wm.pdf
    • https://cdn-cms.f-static.net/uploads/4412900/normal_6062e55556931.pdf
    • https://static.s123-cdn-static.com/uploads/4367287/normal_5fc931ab25c69.pdf
    • http://fawikenaxalu.scienceontheweb.net/letoxerutuwen.pdf
    • https://cdn.sqhk.co/ranamifujuki/jsKgj7M/mobile_passport_seva_application.pdf
    • https://cdn-cms.f-static.net/uploads/4392868/normal_5fe7043021dbe.pdf
    • http://walawabijuver.22web.org/how_to_unlock_samsung_galaxy_a10e_straight_talk.pdf
    • http://biomanua.website/93311229142flml0.pdf
    • https://cdn.sqhk.co/mifigatira/jd1WUTy/cube_escape_paradox_walkthrough_youtube.pdf
    • http://fesalasan.mygamesonline.org/rinofazawuxavuvuro.pdf
    • https://cdn.sqhk.co/moturalogupe/e4hd8ge/fisulafasegawogemugaduwen.pdf
    • https://cdn.sqhk.co/doparibi/uUPihgc/3d_skull_atlas_for_windows.pdf
    • http://ourfanz.com/raxelegitanujageabe5.pdf
    • https://cdn.sqhk.co/linidivez/bnhdy73/79372412059.pdf
    • http://mysteps.online/25271885283yih7z.pdf
    • http://lianhua.life/plot_diagram_worksheetrmiei.pdf
    • http://prodit.space/gosalopada306ke.pdf
    • http://regsenatvumen.website/194387264815tqa.pdf
    • http://davupopebuwiser.sportsontheweb.net/effects_of_smoking_while_pregnant.pdf
    • https://cdn-cms.f-static.net/uploads/4486997/normal_6033fa8ab40a2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kitukogoxav.epizy.com/58792055151.pdf
    • http://gusagikatu.rf.gd/behringer_neutron_patches.pdf
    • http://gaxilitexu.onlinewebshop.net/seeds_to_plant_in_january_florida.pdf
    • http://xolavozezimodan.onlinewebshop.net/dumiri.pdf
    • http://kuxatirimupuv.rf.gd/movie_apocalypse_now_1979.pdf
    • http://wasamatebupo.rf.gd/19130121169.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_off000267d0.bin
c9622eb73ec501c2fb9e0aa971addf56daf58c76cd763a802a47f196d8e44065
pdf-font-stream PDF embedded font (sfnt) at offset 0x267D0 5364 bytes
font_01_sfnt_off000279f6.bin
3e98ced2ae29c2562da0c170e2f1355990f1b940d7bb12ab6301dae25f7b5f24
pdf-font-stream PDF embedded font (sfnt) at offset 0x279F6 11728 bytes