Malicious PDF — malware analysis report

Static analysis result for SHA-256 006ad0bb50e600f7…

MALICIOUS

PDF

88.6 KB Created: 2021-06-26 11:54:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 180c197be4ef427b786f28a0bc2723a9 SHA-1: d4c70333e9589bef53f0ae6a5255dd2048f05994 SHA-256: 006ad0bb50e600f7894b92e0db292a8bb7668891e0af6563999e8a9badd1e139
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is heavily obfuscated and likely contains further malicious content or redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://home18.ru/wp-content/plugins/super-forms/uploads/php/files/215202623413d8abd142d49e666763a6/zojumu.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/95bf81f7cba03ce6176cbe92deeceab0/6261995982.pdf
    • https://capitalsyndic.com/userfiles/file/miluteguxotexitidin.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/0e437f61f6b5f3377de9d3b83bd847ce/wafafesakipirunixulevu.pdf
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/15e1d9d56ced5f38228a3b0c2d9e4a82/mozudimixomutonej.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607822cb89cfc---86533994663.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/aded449b1dd4472606e0d7b742b5c921/zogagapeta.pdf
    • https://festival.bg/fckeditorfiles/file/57117496931.pdf
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/f0500673bf7506ae78f7d416a3520f36/58355207045.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16094917db65e5---xozimabegizigokeki.pdf
    • http://beiwendq.com//data/attachment/file/zejedoz.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715bdc22ab4---85071914548.pdf
    • http://www.awakohchang.com/image/upload/File/0153876058.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/f15a63cafbbc0454e2e10850d96f4e60/35291843184.pdf
    • https://almuhja.net/ckfinder/userfiles/files/61590079838.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/41d8297869ff5441ff159b3ca3c6db79/buxuriwojodi.pdf
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/17971232981.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/14a49694c179ae1a914c85cbd9ddb627/4870642149.pdf
    • https://krossi.ru/images/content/files/52778559248.pdf
    • http://aelma.com/sites/default/userfiles/file/96007879895.pdf
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/c3ff2a729450d0f55ffc382f5be00643/potezajak.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760bfa6f67d---nutekav.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=android+games+ad+blocker
    • 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_off0000f8bf.bin
c6beef999df87fab32a830b2c73567d5cad8e834dd980daaef9853dcc4de03e7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BF 10828 bytes
font_01_sfnt_off0001117b.bin
babc4ece26029e8a61400af76424512d1840fa651ed165c755bdfce96c22f520
pdf-font-stream PDF embedded font (sfnt) at offset 0x1117B 16856 bytes
font_02_sfnt_off00013d76.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D76 16792 bytes