Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cca64ca6901b0c6…

MALICIOUS

PDF

115.0 KB Created: 2021-04-07 21:17:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ea1680fe465bdd41b0db6143b19ecb4 SHA-1: 9600967f1d0bd0d72695110a15c52467583317e7 SHA-256: 4cca64ca6901b0c6de4d415d00e7d88f67547f67c6dff94d3f545f36371d0307
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a search result for educational content, likely to trick users into visiting a malicious site. ClamAV and ML classifiers strongly indicate malicious intent, classifying it as a phishing trojan. The embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://midufefew.ru/wix?keyword=algebra+1+chapter+8+review+answers
    • https://cdn-cms.f-static.net/uploads/4470380/normal_600a9b9763e65.pdf
    • https://cdn.sqhk.co/jabosuve/v1Fhbgc/73405757979.pdf
    • https://cdn.sqhk.co/xezafube/Vih2idp/dowozuzenojenago.pdf
    • https://cdn-cms.f-static.net/uploads/4384642/normal_601797087e43e.pdf
    • http://doweryklkq.space/mulapoximilegov4tqtp.pdf
    • https://cdn-cms.f-static.net/uploads/4380531/normal_5fd37e8660014.pdf
    • https://static.s123-cdn-static.com/uploads/4378830/normal_5ff90503769b3.pdf
    • https://cdn.sqhk.co/kugefiruxat/aRge0wB/launch_trampoline_park_methuen.pdf
    • https://cdn-cms.f-static.net/uploads/4500201/normal_5fdb0e24c3bc9.pdf
    • http://shtangye.xyz/epson_wf_2630_sublimation_reviewf9nxm.pdf
    • http://damvglaz6.xyz/wijozakenikeeuso9.pdf
    • https://cdn.sqhk.co/xufaribo/eljgJAN/turkey_drumstick_recipe_grill.pdf
    • https://cdn.sqhk.co/sizafutito/gijgds0/36044739524.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vapomogabu.epizy.com/tepajilovefun.pdf
    • https://uploads.strikinglycdn.com/files/46b632e2-9e1a-4aa2-94e2-1daaff330676/whirlpool_wfc7500vw2_drain_pump_filter.pdf
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_18297877263940d39d5c644929a14359.pdf?index=true
    • https://ef2e072a-e8a2-4438-804d-cc750be2e2f6.filesusr.com/ugd/6a22cb_10d40b8c7eb8465fad711638867b8761.pdf?index=true
    • https://uploads.strikinglycdn.com/files/03c349d0-bb7e-4c6b-9920-2f306ba52d70/kelimiwilolitofa.pdf
    • https://uploads.strikinglycdn.com/files/aa0dda71-5646-4c32-9aa9-3015d75376c5/15778937171.pdf
    • http://zedorufusoli.rf.gd/formulas_tornillo_sin_fin.pdf
    • http://vijanemafe.rf.gd/android_messages_on_your_computer.pdf
    • https://uploads.strikinglycdn.com/files/28be0be8-58ee-4b87-ba92-002f1f472f4f/31885360020.pdf
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_239127a6d29542eea257d440a178f319.pdf?index=true
    • https://d115d978-d96a-40c8-9764-5d959708fc35.filesusr.com/ugd/436160_8096495cc26a47689f8fea2beb0b376b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/194d4d8a-b10e-4110-b1b5-ec7f4205645f/the_boy_in_the_striped_pajamas_wwii_movie_questions.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_off00018140.bin
a5cf4b9d10d1f2f2603eb2b69997a734c16feb9a77149d2a3c050d3a85e022e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18140 5720 bytes
font_01_sfnt_off000194cc.bin
3d92368a88ff0c2ab8a1d82fb1f1a712c027f554c51333f89d7696a75147c68a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x194CC 12148 bytes

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