Malicious PDF — malware analysis report

Static analysis result for SHA-256 71f1e2559dfe1374…

MALICIOUS

PDF

78.9 KB Created: 2021-04-04 10:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 042ccae5a655f1126f058bf3ce45aba1 SHA-1: 2605a833ab74bc7d8fa3a78d1e67497f5cf12a0d SHA-256: 71f1e2559dfe1374c5455d02aaab22f158d46fb0d87b5c1ae5c70f51a51687d9
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier returned a high probability of maliciousness. The document contains an embedded URI pointing to 'https://seumenha.ru/wix?keyword=compile+combat+manuals+feh', which is likely used for phishing or to download a secondary payload. No scripts were extracted, but the presence of the malicious URL and the high detection scores indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/wix?keyword=compile+combat+manuals+feh
    • https://cdn-cms.f-static.net/uploads/4450424/normal_6046fc3d8c734.pdf
    • https://cdn-cms.f-static.net/uploads/4481402/normal_6056881b2ddf1.pdf
    • https://static.s123-cdn-static.com/uploads/4476596/normal_6009a73d9d323.pdf
    • https://cdn-cms.f-static.net/uploads/4447914/normal_6022e3db89ece.pdf
    • https://static.s123-cdn-static.com/uploads/4426422/normal_5ff3fed873941.pdf
    • https://static.s123-cdn-static.com/uploads/4425483/normal_5ff0456c9b789.pdf
    • https://static.s123-cdn-static.com/uploads/4469617/normal_5fefb37891a53.pdf
    • http://ridaxaki.mywebcommunity.org/noxironas.pdf
    • http://kaxavetaxudu.mywebcommunity.org/zotimapiwesufamina.pdf
    • https://cdn-cms.f-static.net/uploads/4491153/normal_6062ed32cc8b8.pdf
    • https://static.s123-cdn-static.com/uploads/4459623/normal_5ffa13df84ae2.pdf
    • https://static.s123-cdn-static.com/uploads/4378425/normal_5ffb90d09c0f0.pdf
    • https://static.s123-cdn-static.com/uploads/4389095/normal_5ff264d4be198.pdf
    • http://kutejovanog.getenjoyment.net/account_ratio_formula.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nodetuxapabara/what_is_iso_9001_factory.pdf
    • https://s3.amazonaws.com/dovulavavo/72094910102.pdf
    • http://sajomapujozokux.onlinewebshop.net/vilidexiwol.pdf
    • https://s3.amazonaws.com/nuxulikiwab/gilower.pdf
    • https://s3.amazonaws.com/vavejijitatofu/rozebevijegogunivo.pdf
    • http://palelezugob.onlinewebshop.net/axinterop._acropdflib._dll_latest_version.pdf
    • https://s3.amazonaws.com/nunakixuma/coyote_creek_fishing_report.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_off0000e8d7.bin
210332718c177f8960aeb92b46036e39533ac2e626cb2c1634ce8729c5db8ff2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D7 4184 bytes
font_01_sfnt_off0000f781.bin
4823960c00a908aa67398a3f77b86d6bb6fecdbdf4c80079497b92abbdf33ce9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF781 5204 bytes
font_02_sfnt_off00010909.bin
e5f468f47243d89dd809b75b23d6b7d7a23e5cd773891e5d734608d0478b8d99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10909 10880 bytes

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