Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a6350162487cb0…

MALICIOUS

PDF

108.5 KB Created: 2021-07-25 20:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 725f727fd7466ba91603be771453e16d SHA-1: 82abd83f9682e4efb56b42cf3ae016c6fcc2f6fe SHA-256: e0a6350162487cb00fe1be166a7fe77c8b1f23c72f14924b7b7d3b85804e19bf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's designed to distribute further malicious content. The embedded URLs, while some are marked benign, are part of a larger pattern of hosting malicious PDFs on potentially compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8df141537---sajagumobiwelomiluzomutil.pdf In PDF document text
    • http://belgium-ex.com/images/blog//file/66991274083.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/f8e179b0105341b2cae477de94a3549e/sibofitoravazotedav.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a58c50909e0---77886839531.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070791a8892e---57899127515.pdfIn PDF document text
    • http://preserveproperties.com/userfiles/files/janope.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/kesimimok.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/37421347228.pdfIn PDF document text
    • https://btcauction.vn/hinhanh/file/54745663671.pdfIn PDF document text
    • http://hillandcunnreunion.com/clients/864369/File/kejigizoj.pdfIn PDF document text
    • http://huh.hu/UserFiles/File/samugowol.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/746145565370ab4babcbf84bd8e42f0d/25084246919.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a70dd779c54---37264275054.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/59978385945.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa687c3fad---nizitinet.pdfIn PDF document text
    • http://asfus.net/virgsurv/userfiles/file/51747095494.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8a02c1f17---letenipumapuperuloreseji.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/28555153886.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9f3102946---ronexiwusubunidaradofa.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/pegisofatupololibow.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/xupikigasoxeso.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/bajolodubokopisigenif.pdfIn PDF document text
    • https://oxi-dental.ro/imagini_ws/331018400.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/c8aeef25c0bdb19eede063c12ae854bd/33289620595.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/72530489887.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=bees+saal+baad+full+movie+480p+downloadPDF 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_off00013e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E2D 11312 bytes
SHA-256: c6a1eb085dcf192e10bde2c70e86d6977f0bb34df6651b5378f1476697cb102a
font_01_sfnt_off0001589f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1589F 18604 bytes
SHA-256: 9bca56096cd656c88e02cd2548862900696ec7c50630f33c968330ea0f46ff3a
font_02_sfnt_off00018a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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