Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd2c8ed65f3fa07…

MALICIOUS

PDF

85.2 KB Created: 2021-09-22 11:18:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9433a47de120ed851a4f4e56ca133fb4 SHA-1: 484203f2d831800fa5710075bfcf4565d89caed1 SHA-256: edd2c8ed65f3fa073d9fc30853cb48768848d4cee255847f4488001ee4458871
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links are indicative of a spearphishing attachment, designed to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://archism.ru/uplcv?utm_term=gta+five+download+mobile
    • http://abnicum.ru/files/file/xudivufujiwel.pdf
    • http://erh-hu.com/userfiles/file/50867640167.pdf
    • http://rjt1.org/upload/files/69213152675.pdf
    • http://carbonelite.ru/file/91126356924.pdf
    • http://webinaris.blog/ckfinder/userfiles/publics/files/riromisewafawoxesipa.pdf
    • https://indiantalentjunction.com/milan/media/varibefixezoxoxetuwe.pdf
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/guwebavivet.pdf
    • http://sahcarpets.com/userfiles/file/ruwakenijozukepazi.pdf
    • https://supremeroi.com/FCKeditor/file/gaxexexaxubobixo.pdf
    • http://csc028.com/userfiles/file/20210915200106_u8sj9d.pdf
    • https://shevtsov-art.com/uploads/files/numoxawutepitikalegot.pdf
    • http://files.ibiza-ferien.de/file/denufunoxewe.pdf
    • http://pzhjintai.com/upload/files/norawusomij.pdf
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/93596322707.pdf
    • http://gelikonline.ru/content/Files/98656148198.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142292fceae3---dosarelob.pdf
    • https://www.disbel.es/ckfinder/userfiles/files/70582255497.pdf
    • http://speckrepej.com/upload/file/74081883054.pdf
    • http://sxhk365.com/uploads/file///mebusexixumeso.pdf
    • http://drcleancenter.com/uploads/files/202109121302087468.pdf
    • http://langfordfinancialservices.com/userfiles/files/lezakamuwuzonimofewebo.pdf
    • http://the-bom.kr/upfile/files/21080349582.pdf
    • https://budgetparking.ca/admin/uploads/file/5519492304.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://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_off0000e8d2.bin
cce436d2bc823d8a45bddeac94ca3b8e9b8078999a26e4d0c29d09df5aa295b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D2 17780 bytes
font_01_sfnt_off000116f6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116F6 16792 bytes
font_02_sfnt_off00012f0d.bin
2f0dc41c249adabc691fb01d91ae3c30cf6cbac0e10c64e74b365e5a2ac24187		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0D 10580 bytes

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