Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf13004c358750ec…

MALICIOUS

PDF

75.3 KB Created: 2021-03-09 01:56:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b38adf7d1d775f361b35513afc201747 SHA-1: b7f830d494470b6e48ae9ddc39c3dda8fce4526b SHA-256: cf13004c358750eca84e021cf92cd2d98c8eb36968b48e2141ab5a675272d89e
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified as malicious by ML classifiers and ClamAV. The document body, though heavily obfuscated, suggests a financial context ('Tui ag balance sheet'), likely a lure to encourage users to click the malicious link. No scripts were extracted, but the presence of external URIs and the overall detection by security tools indicate a phishing attempt.

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://dafemum.ru/123?utm_term=tui+ag+balance+sheet
    • http://likefetevu.getenjoyment.net/centralised_air_conditioning_system.pdf
    • https://puzepoxa.weebly.com/uploads/1/3/4/3/134318678/virozirir.pdf
    • http://vuwimoxit.mygamesonline.org/newusokevipokufup.pdf
    • https://mitexasax.weebly.com/uploads/1/3/1/8/131857270/kuporaverukatirazomo.pdf
    • http://zitalogeloluwiw.mygamesonline.org/mimekulezud.pdf
    • http://zisuroto.mygamesonline.org/sunbeam_fan_heater_reviews.pdf
    • https://lurotafimeka.weebly.com/uploads/1/3/0/7/130740015/vevogunotiginaluw.pdf
    • http://rujitexoxobag.mypressonline.com/63785047507.pdf
    • https://lurenosofen.weebly.com/uploads/1/3/0/7/130740325/ladigarede.pdf
    • http://varuzajuv.22web.org/boilermaking_books.pdf
    • http://nipawifaxupus.mygamesonline.org/why_wont_my_aux_cord_work_iphone_8.pdf
    • http://tetupamino.mywebcommunity.org/dafovodotijemavu.pdf
    • https://widijozitumude.weebly.com/uploads/1/3/4/6/134688085/c5f573cc0c3a.pdf
    • http://lowufadit.scienceontheweb.net/eberron_five_nations.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a854ab30-b85e-4f25-aa1f-c6a51ef0818a/vw_maintenance_schedule.pdf
    • https://uploads.strikinglycdn.com/files/42f23708-5420-4ac0-a836-548bff0e94ed/are_convection_microwave_oven_healthy.pdf
    • http://tevefetilojas.atwebpages.com/lubosiwotitil.pdf
    • http://sufixis.myartsonline.com/31503166081.pdf
    • https://uploads.strikinglycdn.com/files/010ef8b2-115d-4470-b82d-ee7fdfd64b55/8847206283.pdf
    • http://zotubune.myartsonline.com/32804463803.pdf
    • http://radujexoxetapil.epizy.com/car_games_free_for_pc_softonic.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_off0000e9ed.bin
88ff2b6df279eb0e7106b9a1373be46d6d127b889f5b2ba2d3aebc06688b634a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9ED 5052 bytes
font_01_sfnt_off0000fb1d.bin
3efe2083453c0bc7e230389cb055e0618138c8d72ccb350b339a5962641eeaeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1D 11184 bytes

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