Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f64098dc8cf693a…

MALICIOUS

PDF

86.7 KB Created: 2021-07-13 21:32:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7140f9ad819423cd7a1e9fe21a956c82 SHA-1: 69e61538fd70e6c0345a85b9def527c7d33bc0ba SHA-256: 9f64098dc8cf693afc12944f21f2c93782163a1daa4423e8d4acb3500573f667
196 Risk Score

Malware Insights

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

The PDF contains numerous links to potentially compromised websites, many of which are hosted on disposable domains or use formcraft plugins for file uploads, indicating a link farm designed to host malicious content. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's purpose is to trick users into paying fees for a non-existent prize or parcel. The ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf679e27dc---61274229396.pdf
    • http://fishtech.org/uploads/userfiles/file/file/83941672727.pdf
    • https://communeouchamps.fr/userfiles/file/29638841130.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c774a508f0---40072344811.pdf
    • http://salsainkonstanz.de/media/files/dizavurulevefuxumun.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9323d0d1ec---gubiwu.pdf
    • http://ristoranteyuri2.com/userfiles/file/wezadevufuler.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ec57cedf6---57920235473.pdf
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/48096460729.pdf
    • http://ahxxzx.com/userfiles/202104/file/kopavetar.pdf
    • http://smflow.in/admin/uploads/file/17039176107.pdf
    • http://elementsgogreen.com/userfiles/file/20321519049.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ceec54edb1---pigupaji.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608764ef49939---67248805866.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160916e09addd2---rajedoliwuwirakuje.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/69fa3c1a6643f1f47a94ffdf58304807/mivevixajezaxavuwasiz.pdf
    • http://szpk.hu/_user/file/43336335964.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/5qr4anvb5145orauosol5tpb92/32955179940.pdf
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f016b79dcd---vanavoxekezava.pdf
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/sh21r1v556jrutrcm9a407otuh/77170858637.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c40a344cf61---62952617386.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e3fb4cf99---72253713915.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f95fc934d9---bomukidarizosaguvado.pdf
    • http://insidethedigitaltrend.com/userfiles/file/lemakidokupaf.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b277c2ce582---fakepukato.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+share+pdf+in+teams
    • 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_off0000efa6.bin
0496e01f68815eef257e88c956b0e97aa2e4b316c62fcdd3e16531cbf9cab53e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA6 10792 bytes
font_01_sfnt_off00010856.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10856 16792 bytes
font_02_sfnt_off00012068.bin
d5fdbf35966c44605faa7f4a4def7e64363dfa86452519fc557e5a47e47d9bbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x12068 17376 bytes