Malicious PDF — malware analysis report

Static analysis result for SHA-256 319dee4c2c0ee19a…

MALICIOUS

PDF

78.4 KB Created: 2021-03-21 06:03:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e82faae642a4876cd1b863668a3ba6b1 SHA-1: 21ad5507f298dea907e644f77e28328c4d78faf9 SHA-256: 319dee4c2c0ee19a207e4c0e1496f8b460ed617bddd77f94b9a37adcc6166b18
96 Risk Score

Malware Insights

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

The PDF file contains a URL that redirects to a malicious domain, likely as part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of embedded URLs and the nature of the detection suggest an attempt to exploit user interaction, potentially through embedded JavaScript or by redirecting to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=what+do+you+mean+by+security+analysis
    • http://xesapuwax.mywebcommunity.org/fulovuwavikerugujaxix.pdf
    • https://static.s123-cdn-static.com/uploads/4494648/normal_60088f06a2e11.pdf
    • https://cdn-cms.f-static.net/uploads/4369907/normal_601b43b95eba9.pdf
    • https://static.s123-cdn-static.com/uploads/4374013/normal_5fec30eb34d81.pdf
    • https://cdn-cms.f-static.net/uploads/4449399/normal_5fd6de7da1cac.pdf
    • https://cdn-cms.f-static.net/uploads/4391921/normal_600fcafe57004.pdf
    • https://static.s123-cdn-static.com/uploads/4379217/normal_5ff1468ca89e6.pdf
    • https://cdn-cms.f-static.net/uploads/4369505/normal_6051b4e840657.pdf
    • https://cdn-cms.f-static.net/uploads/4493266/normal_602ec386e421e.pdf
    • https://static.s123-cdn-static.com/uploads/4490936/normal_60089cf1e84e5.pdf
    • https://static.s123-cdn-static.com/uploads/4372702/normal_5febcf9b7e2ab.pdf
    • https://static.s123-cdn-static.com/uploads/4424632/normal_5ff2f6dd4237f.pdf
    • https://cdn-cms.f-static.net/uploads/4385880/normal_5fd81a15e68e4.pdf
    • http://kakafeg.scienceontheweb.net/dalivudixosinunex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fadobirak/routledge_encyclopedia_of_philosophy.pdf
    • https://s3.amazonaws.com/fidefofudi/aethra_s_chronicles_game.pdf
    • https://s3.amazonaws.com/fokapikow/tuzevubibanezow.pdf
    • https://s3.amazonaws.com/feliso/the_bfg_cast_poster.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_off0000ea1a.bin
f1383d7cd59a6739427f7596f1165603adacbacc8f657d4e156367611f565abb
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1A 2828 bytes
font_01_sfnt_off0000f423.bin
6d231af15bf61da24f40b27e943f3e76dfce8b3746ac6fdc890d3dbf91c61639
pdf-font-stream PDF embedded font (sfnt) at offset 0xF423 5436 bytes
font_02_sfnt_off00010680.bin
849a342913a05fe7cbf5a03a7b16c59497fb48f9b10d73d30841cf44544fa398
pdf-font-stream PDF embedded font (sfnt) at offset 0x10680 11032 bytes