Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8eeee9b92e4a24…

MALICIOUS

PDF

80.8 KB Created: 2021-07-04 05:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a49047a863a165ac6eaf63a203990efc SHA-1: e5aec29f33b0e9197fee5b06b1962676c49c6b2d SHA-256: ee8eeee9b92e4a243a46084257b17ced41bc8a7817e9ff6d809f021e5303655b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with a phishing or malware distribution campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://project-lovcen.me/userfiles/file/9894810773.pdf
    • http://partnerplus30.ru/images/fornews/files/13569414773.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0b9329cdd---rareravizoziz.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/0sp7g2pvjp9b97t5bovh7191q6/xukedowitanemoxuxixi.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4d7447f74---jojuzoz.pdf
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e6fdbc2e5---44062102677.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b21848a7a0d---29033457018.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607c88eb2bb7f---piromodaxil.pdf
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/625c54c08216465f30fe3f46ec213d62/dozororonepitupowuxeg.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16072d68a24014---52382412927.pdf
    • http://berbun.com/user_img/file/gigodamokawolakebalido.pdf
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/23e2066ed676232a78140513173c41c5/wixatekorimuvibef.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/2f48cd1996e5f4ff43eb40b38e47a1ad/ritumokiluzigor.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608971b482d32---90649935994.pdf
    • http://wksystems.net/HotelEstimator/userfiles/file/gokuxatilulutugixovawide.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160d53e2c52e81---kirirux.pdf
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/dd985a435712de584e2c8731d3cdde90/35685222651.pdf
    • http://vds-construct.pl/userfiles/file/sogesogozibonigumula.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607306cd17252---tobatoxe.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/6887465d19108618bd271ded20f19915/94764220848.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160984c5e2a2af---43913110184.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/6c0180b47ffc5f05b81a7b5d06086102/zepusutelezapexi.pdf
    • http://jdjcnc.com/upfolder/e/files/20210704100056.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=idd+country+code+852
    • 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_off0000d871.bin
13716035ea8f8127ca8f37b822f7e9dd118544c2eea5676a3b46663bc8ab7665		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD871 17240 bytes
font_01_sfnt_off000105d7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105D7 16792 bytes
font_02_sfnt_off00011dee.bin
1169b8bd7087eff6232a238f83766d2c9a5899142a0f6b8ca84e34fb30767569		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DEE 10520 bytes

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