Malicious PDF — malware analysis report

Static analysis result for SHA-256 8221d9d80d12b4d4…

MALICIOUS

PDF

81.0 KB Created: 2021-06-10 22:28:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 850976004a61251c6132f7d136cfdced SHA-1: 701165f8f4a386ede060694184349318997b1d5b SHA-256: 8221d9d80d12b4d4b500a99f52c971cbea6d150e1c72d581bb73fd6c55578a55
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on link farm domains, suggesting a phishing or malicious content distribution attempt. The primary lure appears to be related to downloading popular media content, such as 'Game of Thrones' subtitles. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://drafthe.ru/pbw?utm_term=got+season+8+episode+6+subtitles+download
    • https://rajawanog.weebly.com/uploads/1/3/5/3/135320481/fidetejiloz_xukipa.pdf
    • https://static.s123-cdn-static.com/uploads/4469128/normal_5fc7a96c353a8.pdf
    • https://cdn-cms.f-static.net/uploads/4481058/normal_603e8b6bc7320.pdf
    • https://megogolu.weebly.com/uploads/1/3/4/3/134314378/jirubibifex.pdf
    • https://nusomosuguxapo.weebly.com/uploads/1/3/4/6/134693055/9499613.pdf
    • https://cdn-cms.f-static.net/uploads/4449001/normal_60205ebc16c9c.pdf
    • https://cdn-cms.f-static.net/uploads/4465144/normal_60bd19a69d863.pdf
    • https://rulodewarozuw.weebly.com/uploads/1/3/4/6/134678260/lunamuvogekapo.pdf
    • https://cdn-cms.f-static.net/uploads/4476146/normal_600d43176f82b.pdf
    • https://zewakifu.weebly.com/uploads/1/3/0/7/130740590/2d37919d29d18e1.pdf
    • https://static.s123-cdn-static.com/uploads/4414495/normal_5fd08a6f5e670.pdf
    • https://cdn-cms.f-static.net/uploads/4419003/normal_60391b68250dd.pdf
    • https://cdn-cms.f-static.net/uploads/4503617/normal_6018545adfd5b.pdf
    • https://static.s123-cdn-static.com/uploads/4369316/normal_5ffe261f43647.pdf
    • https://kimewazokedusa.weebly.com/uploads/1/3/1/4/131454536/dinelomusotu.pdf
    • https://cdn-cms.f-static.net/uploads/4366028/normal_6026df03b625d.pdf
    • https://static.s123-cdn-static.com/uploads/4387586/normal_5ffbc3d67042f.pdf
    • https://cdn-cms.f-static.net/uploads/4388289/normal_5fdb2a60551ac.pdf
    • https://wufujaxuwagax.weebly.com/uploads/1/3/4/4/134400484/gagetibuk_vemaxenu_xulixotumuzo_pefagipidowujat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://poxanoralanu.pbworks.com/f/munna_bhai_mbbs_movie_mp4_song_download.pdf
    • http://wusagem.pbworks.com/w/file/fetch/145055748/17156753870.pdf
    • http://nusometa.pbworks.com/f/english_b2_grammar.pdf
    • http://pebolokunaz.pbworks.com/w/file/fetch/144640959/83119140844.pdf
    • http://sazupamufode.pbworks.com/f/apostila_tecnico_refrigerao_senai.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_off0000e54f.bin
1ef480125b300bddd7a90fe7e2494e7dec6667131360cfb25dca3b15b854f9ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE54F 5468 bytes
font_01_sfnt_off0000f805.bin
51c35f0be26c2e21dc1d2818a4a8fe1b80991d3eb5afe3d95c45e1b930ca0d94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF805 11060 bytes
font_02_sfnt_off00011d75.bin
591cd7837a75d3a6a599953bffaf8d309b2de192ee0a5b505c4226884b9b3fbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D75 17048 bytes

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