Malicious PDF — malware analysis report

Static analysis result for SHA-256 599ed495442e2690…

MALICIOUS

PDF

88.2 KB Created: 2021-04-05 13:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1a03c4fde417a2aa5cc88fedca65a37 SHA-1: 990714cc8eca8a5b39da223d1fd68c83fda73892 SHA-256: 599ed495442e2690a8501cbc8481b8688e09eb7514fddfd815609d3f3a3f74a0
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with the primary one being 'https://mezovuduw.ru/wix?keyword=physical+therapy+school+letter+of+recommendation', suggesting a lure to a phishing site. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://mezovuduw.ru/wix?keyword=physical+therapy+school+letter+of+recommendation
    • https://kimilofu.weebly.com/uploads/1/3/0/8/130873947/vaxawotikineti.pdf
    • http://xexapitanegis.getenjoyment.net/katave.pdf
    • http://deliwubavamir.mypressonline.com/what_are_the_rules_for_commas.pdf
    • http://lulizukudomiz.scienceontheweb.net/preparing_for_a_job_interview_questions_and_answers.pdf
    • http://ziximotizaned.medianewsonline.com/13149992822.pdf
    • http://jelojutu.sportsontheweb.net/77680351371.pdf
    • http://bumululoru.mywebcommunity.org/english_grammar_exercises_pre_intermediate.pdf
    • https://luwupedo.weebly.com/uploads/1/3/1/3/131383743/vubetupuvetenej.pdf
    • https://cdn-cms.f-static.net/uploads/4380701/normal_60464e0265639.pdf
    • https://cdn-cms.f-static.net/uploads/4391326/normal_602274f69d427.pdf
    • https://jemaveroker.weebly.com/uploads/1/3/5/3/135391058/vusinopaparesix.pdf
    • https://static.s123-cdn-static.com/uploads/4451551/normal_5ff6a0d7050c8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/farokof/43795768780.pdf
    • http://jibitolokadidus.rf.gd/knight_of_the_seven_kingdoms_next_book.pdf
    • https://s3.amazonaws.com/kopisigapub/avidyne_ex5000_mfd_manual.pdf
    • http://xifofemixogo.rf.gd/pathfinder_kingmaker_review_2020_ps4.pdf
    • https://s3.amazonaws.com/rebomedug/wabidinadirogajavilo.pdf
    • https://s3.amazonaws.com/tetofamuxulil/tenant_rental_agreement_template.pdf
    • https://s3.amazonaws.com/ginutu/how_to_trade_using_forex_app.pdf
    • http://boseradewegow.rf.gd/html_and_css_book_review.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_off000119d7.bin
91574973916419f6301a5f44100c3840da39881ad1cda9f828665f61b2167222
pdf-font-stream PDF embedded font (sfnt) at offset 0x119D7 5496 bytes
font_01_sfnt_off00012c67.bin
16279f5007b60a384ab6cee111248334845909a906f444db74a0710106835570
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C67 10768 bytes