Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8857a3869e17f9c…

MALICIOUS

PDF

75.8 KB Created: 2021-03-29 00:32:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 680824fc9e45454baf07a45703456cb6 SHA-1: bb6f058b1a1ade09640be63a937a383fd89b6dc1 SHA-256: d8857a3869e17f9c254b804dd54540c2d6b4bd5250426198d69e6ac02bb69d89
136 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains suspicious links, one of which is an invisible link designed to trick users into downloading a secondary malicious PDF. The document body, though partially corrupted, suggests a lure related to 'energy flow in ecosystems worksheet quizlet'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://ponafet.ru/wix?keyword=energy+flow+in+ecosystems+worksheet+quizlet
    • https://xitititoludazo.weebly.com/uploads/1/3/5/9/135987602/pozesu-rinewelapepibom-monewafawu.pdf
    • https://falugasotemo.weebly.com/uploads/1/3/1/4/131410545/3090896.pdf
    • https://solebuza.weebly.com/uploads/1/3/1/4/131453496/sipebavasad.pdf
    • http://rozewevojalel.sportsontheweb.net/barbell_medicine_the_bridge_2._0.pdf
    • http://medazuxa.mywebcommunity.org/wiwunepoxujudiwotijo.pdf
    • http://gnatural.space/symptom_management_mental_illness_worksheets8a424.pdf
    • https://cdn-cms.f-static.net/uploads/4454547/normal_602ab27453a19.pdf
    • http://securityofusersdevicesonline.site/kepetomimutefawx9ua6.pdf
    • http://dafagaketa.sportsontheweb.net/estrategias_de_aprendizaje_kinestesico.pdf
    • https://dodukitomot.weebly.com/uploads/1/3/1/4/131407143/7032402.pdf
    • http://useraisins.pro/free_yard_lighthouse_plansyliii.pdf
    • https://cdn-cms.f-static.net/uploads/4425256/normal_6019b3d930814.pdf
    • http://ruwemipuwev.mypressonline.com/induction_motor_speed_control_using_fuzzy_logic_controller.pdf
    • http://vazawujuzu.sportsontheweb.net/seismic_waves_activity_sheet.pdf
    • http://pojokup.getenjoyment.net/15153265746.pdf
    • http://vopugixeroramox.medianewsonline.com/dolugelovuwopifuvumo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kimawawasero.onlinewebshop.net/arm_a32_assembly_language.pdf
    • http://vidofebusezix.epizy.com/vigotiv.pdf
    • http://xatofobimuxu.rf.gd/act_practice_test.pdf
    • http://valupakukav.myartsonline.com/wexoneregagijedogifi.pdf
    • http://paguxesij.myartsonline.com/87477761178.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_off0000e9ae.bin
fe8fdcac4a35b2dcd4ad1429f5c13466f3285af2babf211d7994db62c9fa29f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AE 5476 bytes
font_01_sfnt_off0000fc56.bin
d3e23d8389f0968c2cfc4ad904815fab8a2494599e98ee291f60e0e015cdad05		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC56 10932 bytes

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