Malicious PDF — malware analysis report

Static analysis result for SHA-256 583b64605e99ac5c…

MALICIOUS

PDF

98.1 KB Created: 2021-03-31 05:06:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8bc5499ca563e6834e5cdb8ebb7d1e8 SHA-1: 85c3a56cf0112835d3d1a7ab03eb85f15aac2366 SHA-256: 583b64605e99ac5c402f85b933ca4849d8dda0031e8a3f8ddf7422966074097f
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, https://maypoin.ru/award?keyword=adenomyosis+uteri+pdf, is likely used to deliver a malicious payload or redirect the user to a phishing site. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to exploit vulnerabilities or trick the user into visiting a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/award?keyword=adenomyosis+uteri+pdf
    • https://cdn.sqhk.co/gubisagebuto/sztjhBI/48308487663.pdf
    • http://tokio-2020.fun/wosomop93f81.pdf
    • https://cdn.sqhk.co/ruzivogawa/KhhVic2/jezoguzowobopikosuzamek.pdf
    • http://pewodaz.22web.org/sumijumagikusi.pdf
    • http://jodopafipunew.22web.org/97669234628.pdf
    • http://nilozususa.iblogger.org/keto_recipe.pdf
    • http://kinoogf.space/duserujonamsoc7r.pdf
    • https://cdn.sqhk.co/feletitami/je74nia/6533653750.pdf
    • http://vusejulene.iblogger.org/download_adobe_acrobat_reader_for_pc.pdf
    • http://xumegexujarev.22web.org/bemudagipudesi.pdf
    • http://fudevifixafije.iblogger.org/boltzmann_statistics.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_1c3ed88519b14a309d33ae08b2537276.pdf?index=true
    • https://9462281c-6212-45c1-8f90-c4e3c363a226.filesusr.com/ugd/007d40_bd12fda9d3d24d5cb37c143aaa24f88f.pdf?index=true
    • http://kixixiwibatogit.epizy.com/adobe_file_test.pdf
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_c0f6d5349dd54c4dafd4b70e4e815567.pdf?index=true
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_38f8603b87144419ac6f9a16a13fbe7b.pdf?index=true
    • http://duxurajixi.rf.gd/zonetewetororafukol.pdf
    • http://zutadefado.epizy.com/happy_birthday_name_cake_photo.pdf
    • http://boponewutizubi.rf.gd/kevekosipewewejulogi.pdf
    • http://dolifusekaxug.epizy.com/nirotuwevav.pdf
    • http://lifarodanudu.rf.gd/nofalu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013603.bin
d25594c0083eb191352c306643f176d9bbac856296d27c95dd27591f29c49f7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13603 4920 bytes
font_01_sfnt_off000146aa.bin
1175bfcc0555677d9403df31dcd68e9a2833f78dd92e4e7804341bed7df59fbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x146AA 11600 bytes
font_02_sfnt_off00016d2a.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16D2A 4324 bytes

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