Malicious PDF — malware analysis report

Static analysis result for SHA-256 9977f8748b084bcb…

MALICIOUS

PDF

74.2 KB Created: 2021-06-11 18:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 002f65cf23645b5681656d4a18736a52 SHA-1: f070d48096381332c63fbae531325a69c41edbac SHA-256: 9977f8748b084bcb888a73ec0293cb62cae384feb128171dccbdf2a59cea7975
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to compromised websites, including WordPress upload directories, suggesting it's part of a link farm designed to redirect users to malicious content. The embedded URLs and the document's structure point towards an attempt to trick users into downloading potentially harmful software or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://philabc.ru/uplcv?utm_term=ms+office+7+free+download+for+windows+7
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c1fd9def526---72610955791.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/e1f966ba9aec1b1e5380d5a6814ca2a0/govuwugori.pdf
    • https://btegypt.comfile/sinugo.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/5b8b40f7906e266949abf156df277144/35649666497.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16072e16ade4f8---kotatopit.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099eb2b63e7a---27420953064.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f3e6903f2---puzusotufudobedolidi.pdf
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806496696f1---pabaxaf.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160879cf99a834---kuziwal.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607114b4af2bb---gamasofusijezedimejo.pdf
    • http://mispuntossaga.com/campannas/file/19588014936.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e244ba2515---75970149667.pdf
    • http://alibabashipping.com/userfiles/file/mawivomanerusakek.pdf
    • http://hgbs.de/userfiles/file/76960465654.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079589c6ac62---mukejorebanuvededugu.pdf
    • https://evboosters.com/wp-content/plugins/super-forms/uploads/php/files/2a5672cf98db36c7f611fbcf0c5597d0/96319685682.pdf
    • http://batiment-tunisie.com/userfiles/file/7453104522.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6b6.bin
7d535db20448c3e00d8ff9a5f23ccda53b17d3d7c9e1ca19270bfdb64c00e89d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B6 5192 bytes
font_01_sfnt_off0000f895.bin
d13e9d4a161925a7e52ae19ab9e9062febd529ce1b017d6ea0b886adea8bb848		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF895 10372 bytes

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