Malicious PDF — malware analysis report

Static analysis result for SHA-256 da614245afe1a551…

MALICIOUS

PDF

107.2 KB Created: 2021-06-27 14:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5732e1b0207a843d7f1e4ea8154f6ddd SHA-1: 8ecd1bc7487a979984c9054d6b4a6107ad8af9b3 SHA-256: da614245afe1a5517cc8cb60015b0c9265bcbf757ba39ed594a65aa9fae4a204
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm that points to numerous distinct hosts, many of which appear to be compromised WordPress installations. The primary purpose seems to be redirecting users to external sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47cf30dd9d---79386601873.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160898017b2f96---58637560889.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/d5d463485a1c96089469ca490a4c0da6/fivurufezinegafutov.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac48bc21f39---tures.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ed0fc6c12---detokatosuleposudoponev.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f77d0a6a3a---57309818911.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/3b87025a0514d654278c707ccb737901/gubososunozuzurikegu.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c663b2e646---52156574283.pdf
    • http://maychamsocda.vn/images/userfiles/file/10473072024.pdf
    • http://elfuklid.cz/foto/Image/file/47961660439.pdf
    • https://exlite.it/ckfinder/userfiles/files/mavow.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c5f14bfa8---nerusedafaku.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/ac5d050badcc5853063ac076d074a987/kavawijijojuruxewobixe.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/601ee49722b86b3cecdea227906347e4/babotox.pdf
    • http://datev.hu/ckfinder/userfiles/files/vazotoro.pdf
    • https://gastrotest.co/ckfinder/userfiles/files/31848431293.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/it8396s590nd3ognoe3vn1b0hg/89615913100.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/52836733092.pdf
    • https://aquafilling.com/userfiles/file/95176777019.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9e8bd0e63---96908126068.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/7e05d44177fba1e0ba5407bf7298a349/lugokulumovutabudoda.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160916ded5392c---wirojaziwamimaxusomovuvef.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d64552065b---dazitiziburufuzobito.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cfad6245a64---64977369717.pdf
    • http://aaaexpressac.com/userfiles/file/pofaredetalomud.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=definition+of+patronize+me
    • 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_off0001409b.bin
ae53d499a1d0713e2e2d4c0635222a0d09295f51c9fb97716f78931b74fbf676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1409B 18460 bytes
font_01_sfnt_off00017013.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17013 16792 bytes
font_02_sfnt_off0001882a.bin
0cf2078d160530832d516f3fb06532564ce10dce4c4b2e9460d6014b46cbbac1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1882A 10368 bytes

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