Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d599c5b2ef731c6…

MALICIOUS

PDF

86.3 KB Created: 2021-07-03 03:34:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 109eee542ac26d6b89aad4964998bdab SHA-1: 2a19c143d75a29cc898c75f145b4f8a12b3b3836 SHA-256: 0d599c5b2ef731c6fe96972d6c57b9329a331ed4a2413da93679c25eadb3b561
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains a large number of links, many pointing to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm for phishing or malware distribution. While no scripts were explicitly extracted, the presence of numerous external URIs and the overall structure strongly suggest a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://crysiq.ru/uplcv?utm_term=blueberry+coulis+for+cheesecake
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b49194dc957---wemedoxakozexobewunikarux.pdf
    • http://iburgisidimarsala.eu/userfiles/files/24709773192.pdf
    • http://thanhlapcongtykiengiang.com/upload/ck/files/sukavepofipo.pdf
    • http://pahsclassof2005.com/clients/d/d6/d61c4c031b0f3af13d3e88110ef3a3e1/File/lidubudaxifewugafetogoz.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609475a24c694---50065276614.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/brt1rfk1br6gk964h1rnlecdfn/bulizetelatofikaxajorosa.pdf
    • https://dm288.rs/slicice/file/wajureroxegazemuvave.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/v102ok155dscgt0gsm7ttqnms7/80615633971.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/129da08808a65de65c4814e9bcaf0913/96197282765.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/rlbu5fg1cc81qt7ota6568ark3/wazebixemonipuzuxiz.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/9b9cae876e46aefcc406264638e758d7/68535404046.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16074fa38babba---53022586700.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/kku0gvep51sfse391qkp7phmh6/83046340615.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c992d5d42---84558882575.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/228p2snvlgppmfd1gciqnik0at/taxusoxepaka.pdf
    • https://ltssinternational.com/res/wysiwyg/file/15082610877.pdf
    • http://bioscipublisher.com/files/upfiles/file/67087284361.pdf
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9875c963dd---tusebapimiwapuzotuwunigal.pdf
    • http://quangcaosms.org/media/ftp/file/junojapatasivitapixip.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/65s1aso496kt4v7j5sc5nomkah/30272947021.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_off0000ea98.bin
33b95ea655b93069d697f2a6c51f9293e8ffd9030b3be64e14190741cd24e2c3
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA98 17828 bytes
font_01_sfnt_off000119b2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x119B2 16792 bytes
font_02_sfnt_off000131c9.bin
285749262aa3419e81a7fa32ebd8920a43cae45b7fe2089e06584cffe1d61c84
pdf-font-stream PDF embedded font (sfnt) at offset 0x131C9 10728 bytes