Malicious PDF — malware analysis report

Static analysis result for SHA-256 1757f661c5bebfe1…

MALICIOUS

PDF

82.3 KB Created: 2021-08-22 21:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: de41ad9514e6e2a78d5bdaecf639534d SHA-1: b88612cc50fd1f9976318169255ca1a21c872eba SHA-256: 1757f661c5bebfe19e723ca0e5c8028e59c247dcd11632a45826eb9496a70f78
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised CMS upload directories, indicating a link farm designed to host or distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9bab1a4c4---34796048913.pdf In PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083178768638---63590235870.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607932ac48299---47554116210.pdfIn PDF document text
    • https://towa-aaa.jp/userfiles/file/mijelojodimapedokutufa.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/sopifukeralenel.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/tuxavotikewogudi.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0507133001620365565.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/2fe1b2cf58f52d0e35337f14fb38501f/bubogulozerusudesenuviwom.pdfIn PDF document text
    • http://broadmoor79.com/clients/864886/File/76156362358.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/c141a922ddbc7bc9e47e43ae2c088525/16922674490.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/80058221967.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/p62quld8urlnveenok4np1bar5/dinewam.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/28091090893.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e675174e4---gazuwimuwiledavibuv.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/xavajixekadafuzamo.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/wedotavabe.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc4dad388d---pogamobowexenarepotibino.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/6989672415.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/7b009f088a02a7454e07faf9319ff7e0/bimemasifor.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/38199308873.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/32280237007.pdfIn PDF document text
    • https://reklama71.ru/upload_picture/xadabaliwetozu.pdfIn PDF document text
    • http://www.octopus-quatuorvocal.com/ckfinder/userfiles/files/72574695753.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=geometry+chapter+5+test+answer+key+quizletPDF 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1ED 11408 bytes
SHA-256: f517c676d619eaab5d4bcd4fe60e4cccf64e7f4e8d3ab16027c3d25ae3a01877
font_02_sfnt_off00010cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD7 17712 bytes
SHA-256: ff6dccccabeb7887a56db399e357668d65305ccca0f506acfac8b7dcb619f88b

Open this report in the interactive analyzer, or submit your own file for analysis.