Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c5d71178092d3a…

MALICIOUS

PDF

83.5 KB Created: 2021-04-27 20:21:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46f234daf1680bf3a4554ded794a393b SHA-1: 2cc9e76e5e928b068c31ca2c3061a4b86d006390 SHA-256: c6c5d71178092d3aadf6613aea084de7c2011921bc7fa58c0b00f0b80c80f2cb
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 URI pointing to a suspicious domain, which is a common tactic for phishing lures. Although no scripts were explicitly extracted, the presence of an embedded URI and the ML/ClamAV detections strongly suggest a malicious intent to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://vilenefex.ru/strik?utm_term=jesus+son+of+god+quotes
    • https://direfuxapiw.weebly.com/uploads/1/3/4/3/134371974/vutenekela.pdf
    • https://fefajuvojamunuj.weebly.com/uploads/1/3/4/7/134750085/gekot-tenefuteronelop-nodinab-rarisako.pdf
    • http://ruzoboxilotazex.22web.org/3385716238.pdf
    • https://wovovude.weebly.com/uploads/1/3/1/3/131397940/4f7ed3af.pdf
    • http://bunulugu.22web.org/63562155894.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jasunusemoki.onlinewebshop.net/what_is_benzene_exposure.pdf
    • http://wovibojo.onlinewebshop.net/99477122943.pdf
    • http://komukofebanukev.rf.gd/rifupiwefifosigazovowirof.pdf
    • http://xofukadebinomo.epizy.com/lekatekidezedozavil.pdf
    • http://najejofimepesef.epizy.com/pdf_splitter_mac_free.pdf
    • http://suvowafavij.epizy.com/majavofuxonaka.pdf
    • https://uploads.strikinglycdn.com/files/0b118223-fd56-4f59-9c10-3e6e7bfd7de8/48539666016.pdf
    • http://gatazor.epizy.com/jedarogorofov.pdf
    • https://uploads.strikinglycdn.com/files/2d8a7c48-3ce3-4d6a-a9eb-ce4f436e818c/dell_latitude_e6410_video_driver_windows_7_64_bit.pdf
    • https://uploads.strikinglycdn.com/files/abc35fa7-6de1-4025-8ce3-d4dd79707af2/28356547293.pdf
    • https://uploads.strikinglycdn.com/files/3d066ba6-7452-4bd5-8b6c-2e858634d764/jodijowepudiriko.pdf
    • http://lipesomidu.epizy.com/stem_and_leaf_diagram_worksheet_ks3.pdf
    • http://nenufun.rf.gd/77980346460.pdf
    • http://gajamozaxekega.atwebpages.com/grade_11_analytical_geometry_questions.pdf
    • http://nomijedelalevi.rf.gd/feneguvixudow.pdf
    • https://uploads.strikinglycdn.com/files/7a5377ee-799e-4869-adc3-0163aca71e86/denon_avr_s510bt_bluetooth_pairing.pdf
    • https://uploads.strikinglycdn.com/files/c91710d7-50c0-4809-bcb4-afddcf22a145/gizuvaropavuxuveba.pdf
    • https://uploads.strikinglycdn.com/files/f5362f94-60bf-42f8-9878-089a1c0ed068/what_is_the_newest_samsung_tracfone.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_off00010b27.bin
270a30537b664639b6a5fe5bca4aaf9db585c18664799694223fbf3b1514f242		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B27 4852 bytes
font_01_sfnt_off00011bb8.bin
e60f56a21ec049f88f924099938938a17227c2ec8ded67e311dbb84497c1e00a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB8 11016 bytes

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