Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb6164dd2ef8c280…

MALICIOUS

PDF

86.3 KB Created: 2021-06-26 00:37:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e1aaa6f927204294bcf7fc3cd0f3b09a SHA-1: 810abee355cfad64729e1a75a54270f25bd595b2 SHA-256: bb6164dd2ef8c280db2cffb6ef67b72bd8077b094d7bfebcb5e28a707cc84fb3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm directing users to multiple distinct hosts, many of which are compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing or malware distribution sites. No scripts were extracted, but the structure and URL reputation firings point to a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/ddu3cn1i215pftc7qi24u2h8hd/78990995066.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/d84fe7206784e6ac291dd694bcdc350e/tanitarulazuluvikila.pdf
    • http://1utilaje.ro/mm/file/42039635323.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/thdeu9siqr2gdajnn3mlstvbn4/jujaxitamafo.pdf
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/3fe674ac3e464c486097b17640e12d1d/58366926881.pdf
    • http://suttonoakfarms.com/clients/880813/File/moputazidamedobu.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/8f008a7116b95270447f7e4100f03abf/jitezikuvunajebufomokuv.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4b26eba2c---8434833099.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bb869038bd0---xebur.pdf
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c5107bce980---xuxikoba.pdf
    • https://bnbcostaverde.it/userfiles/file/18333400343.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/tf705oittet7ah8k0adr98gb3j/1773603626.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e971a03d8d---litalosiwop.pdf
    • http://yearbookplus.com/uploads/ckfinder/files/97220162458.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16099bb4f5869a---233867445.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a26c0594659---84418544157.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8f1961640---93445409582.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f35651832b---saxugopuw.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160725c66b3574---70284342255.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/5220896df6df6a9922579946023530d2/83466204459.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608072e4358a3---21873092924.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/bd94a186e12167d74a6f8fdca5298468/kutavukedofe.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/ce9dca6dd1eefe94c2c2ab6052d36f29/18309261421.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=mrs+downes+red+dead+redemption+2
    • 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_off0000ed7c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xED7C 16792 bytes
font_01_sfnt_off0001058e.bin
fa67bc735e7d4b7767130829a04f0bccb088445ff90068a53d11fd594618046c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1058E 17468 bytes
font_02_sfnt_off00013318.bin
1b7cc4ce0ae55c582baa0daa56f35b9aea00bd2d326bf49a6b87a483e12b07b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13318 10708 bytes