Malicious PDF — malware analysis report

Static analysis result for SHA-256 b246e7faf77508d2…

MALICIOUS

PDF

60.3 KB Created: 2021-06-21 13:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1984ecfe519fbe1ccccaadf2890b3c0a SHA-1: fd4d36e018ee054056a40b865a459dc91202f52d SHA-256: b246e7faf77508d29ed59d5f1406965524df33adbcc6cd536281ddf53fe0dfbb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised WordPress sites, specifically targeting form upload plugins. These links likely serve as a distribution point for further malicious content, such as phishing pages or malware. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or malware delivery campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ee60917d5---diroxatexedune.pdf In PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606d587e71948---febejin.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd1109855c---puxiberixer.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/29277782c63fad329ad0132fa02c0731/31146265801.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1607d37afd00b8---nukolus.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210429023853126.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/tuxujuroxuvamujebemalum.pdfIn PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/10930429072.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e6ef22589---60384860561.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/86275532511.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/23793619072.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/lefifuza.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/66f60e08d92a9f51aa8ccf70a9782ded/dozakivave.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3b864ab11---32825019562.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160726902f2952---27255277144.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/pawedinidefamolomu.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609931855e9bf---30741372817.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/vojezejemuxitafexen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=the+favorite+watch+online+freePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB036 4892 bytes
SHA-256: 6bb03e282ef44a91820baf6e164973c7635e694d1f838e8ca0df253cbe350e35
font_01_sfnt_off0000c0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0EE 10392 bytes
SHA-256: e42eadaf4aec37c1701549824859e839acc39710c7e2bfd65d2ab3f42841fbd1