Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d339c192c02ab8…

MALICIOUS

PDF

94.7 KB Created: 2021-07-26 06:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 119838e13861d0a83bd631ab1a9ec88f SHA-1: fc56de305ca8458bc0bafb34e0a924a61d5b7bed SHA-256: f0d339c192c02ab8977dfaaa2bd90ce5efbcfeb921a2fd6d204e36730efbcee1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains a link farm pointing to multiple domains, many of which appear to be compromised WordPress sites used for hosting malicious PDFs. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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://champaigncursillo.com/userfiles/file/15327976649.pdf In PDF document text
    • http://adacu.org/userfiles/file/20210716060406.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/a1437b10ddf1e3f710ba50416ccbba80/7034873781.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/e34d497680002c58f0a9c8948bf734e2/nopurosopivaku.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/rdd63h0dticctmu02o2r6fcedm/64172514158.pdfIn PDF document text
    • http://mnwebdesign.dk/userfiles/file/kolutixosasowekigefabi.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/vec3h1igtb5hkmevm4a5m6idnh/13256015197.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1608702d8687dc---51926388048.pdfIn PDF document text
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jisavizedokexil.pdfIn PDF document text
    • http://travellerisland.com/files/16088090612.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/86766867560.pdfIn PDF document text
    • http://ltptech.vn/uploads/userfiles/file/vabefuvisud.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/3e0715a4e8e45da14363502b965da22b/57380583219.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4350eb0be---59578048786.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607259c865cfe---wuvegu.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/42452416882.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/kc01gbkgoocenohphirbgnhvug/22014353006.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ff6b93e50---40701461684.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/nirajiku.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/14849708564.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdcdf44d360---35421483837.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1621658496.pdfIn PDF document text
    • http://ideviceplus.be/app/webroot/files/userfiles/files/popagogilebasojuvu.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/44820678959.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/246905405608951aaa6064.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608007ca7295c---jedanodolivotepad.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160718654f0218---75533376068.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2634f447ac---34986626437.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=the+amazing+spider+man+2+v1+2.0+m+download+apk+obbPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D6 18236 bytes
SHA-256: c0d21dce0ff6fd6d7bdf5764dccd5a90d2e2a92d36a8bcc969832527521b181e
font_01_sfnt_off00013159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13159 968 bytes
SHA-256: 58d96e7bff36ed39d9cfa64c5ebd0bb9db8f823ba1fa14bf29783da666329f2a
font_02_sfnt_off00013885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13885 11508 bytes
SHA-256: 309ce7f7a4f3196b5c3b3efddd166079beef33f86116435346dcbac634da0731
font_03_sfnt_off00015342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15342 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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