Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f0c77b72d61f9c…

MALICIOUS

PDF

86.8 KB Created: 2021-04-01 11:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb14c707e349fa25f81557a52216dfbb SHA-1: 5ba4f7b7442a369c61142475178dc85e4c7afdf1 SHA-256: d6f0c77b72d61f9c1fb82a5fbe243cd59f0ad749849deb71eb033fff3c9c8a9d
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, mezovuduw.ru, which is likely used to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to phonetic alphabets, indicating a social engineering attempt to trick the user into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/award?keyword=international+phonetic+alphabet+vowels+pdf
    • https://cdn.sqhk.co/wafasojudo/hiajfjb/wepidapuzusem.pdf
    • https://static.s123-cdn-static.com/uploads/4478968/normal_5fc87d948ea01.pdf
    • https://cdn.sqhk.co/wifinalimow/Gkzihjf/52080600423.pdf
    • https://cdn-cms.f-static.net/uploads/4463825/normal_5fd64d18d1ea3.pdf
    • http://nugawijuxuv.mywebcommunity.org/cgp_books_download_free_ks2.pdf
    • https://cdn-cms.f-static.net/uploads/4445333/normal_60205eec7177a.pdf
    • https://cdn-cms.f-static.net/uploads/4457298/normal_60635e865b807.pdf
    • https://cdn.sqhk.co/fibafape/jeichib/63119814067.pdf
    • http://bosemefawixuwov.mypressonline.com/xogasisuwuxinesasi.pdf
    • https://static.s123-cdn-static.com/uploads/4421943/normal_5ff66fd6541d9.pdf
    • https://cdn-cms.f-static.net/uploads/4478664/normal_604f4423954d2.pdf
    • https://cdn.sqhk.co/xogudililavo/hd58Jch/lufiwanure.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/97eaeb53-f045-4249-96f7-5573dd00916c/95762948004.pdf
    • https://uploads.strikinglycdn.com/files/69116b8e-3e49-4bf7-98c3-06be5a1a054d/4782181437.pdf
    • https://uploads.strikinglycdn.com/files/13565dad-802b-493f-b26f-ac6c4d21214c/logic_puzzles_app_review.pdf
    • https://uploads.strikinglycdn.com/files/ee4b6177-f222-45f2-bd6b-303758eaaa86/river_flows_in_you_guitar_tabs_easy.pdf
    • http://patudesaruvob.atwebpages.com/62170159452.pdf
    • https://uploads.strikinglycdn.com/files/d089b913-2dea-46ec-ba0f-19a8f577ecce/wazufukisexosusira.pdf
    • https://uploads.strikinglycdn.com/files/f3894e5f-8ebd-46dc-8e83-9eec1e781553/62982575752.pdf
    • https://uploads.strikinglycdn.com/files/8ed997ae-bb0d-44fb-b6bc-20fd149796a7/pretty_little_liars_episode_1_google_drive.pdf
    • https://uploads.strikinglycdn.com/files/6de85a8b-dd91-4931-8558-a37d38adfbb9/darubot.pdf
    • https://uploads.strikinglycdn.com/files/e320e501-8506-4905-bc38-44371416ba80/gijazidedosevitik.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e42f.bin
136771f5fff9f168b070dc590c5aada4f133cfa150efed00847fba862646b33c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE42F 5472 bytes
font_01_sfnt_off0000f6d0.bin
f46b8ca142bdd86f11862e341213bb31649e54e18033e0829fee6e261b589cd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D0 21408 bytes
font_02_sfnt_off000138ae.bin
5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138AE 16060 bytes

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