Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2d09ffde0fee29b…

MALICIOUS

PDF

84.3 KB Created: 2021-06-29 08:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eaf07f0d9986c67e5d4bbca6dd7d6d41 SHA-1: c37cae46a898674618b75153866546e5ab41596b SHA-256: f2d09ffde0fee29b65ffcdfade866ebeb3825de14928c683cb792dfd813a2a3d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan distribution attempt. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate an attempt to trick users into visiting harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://cructi.ru/uplcv?utm_term=science+book+for+class+4+pdf
    • http://appletechsolutions.com/userfiles/file/28828498954.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095b25894be3---zefataxowixanaxegesiber.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/fe8feaf22bd4d7ea62e7ca2cba791fa2/85607060107.pdf
    • https://bbgpiti.com/userfiles/files/nuvibadapem.pdf
    • http://phantasos.org/userfiles/file/45156262743.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/ab5d7471013b0cc5424c724c29c55580/7926037840.pdf
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/tugodav.pdf
    • https://dailyhondaotomientay.com/upload/files/66732371392.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16086959ca00be---9926245016.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087995bc238a---zalugatomaxanorusen.pdf
    • http://bhhangkhong.com/upload/images/files/favedosoleli.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1607298601e0e7---10548397900.pdf
    • http://somsit.com/ckfinder/userfiles/files/mudopu.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608399adb04dd---pemukugafuwokafexakorigu.pdf
    • http://originalcheck.it/public/img_admin/file///zerevex.pdf
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16072f01aaae4d---47073250012.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bff85c4d2a7---sibefulidarikenozesosuma.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082f1cf74317---bezatupewapupavepa.pdf
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/61150875800.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/96a9b2c70e36a40ab7afab9e646b646d/64901421437.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3809d5c8be---guvebe.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/53ffe6a256987d311d81ddb8457473e8/nekikodipipowakifigujufe.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16089e29e604a6---rozoberisenojunifosuve.pdf
    • http://ats-dz.com/userfiles/file/21407074876.pdf
    • 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_off0000e7bd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BD 16792 bytes
font_01_sfnt_off0000ffcf.bin
7df6be88ca39ddefd49a59fb0d1f87dc6fd791d6e4fd8ca989c5f9ecad189a42
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCF 16572 bytes
font_02_sfnt_off00012ade.bin
58d63764033fcf1240eb35bfb63aab001a6bfa14740c159699799b70c381a0f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADE 10900 bytes