Malicious PDF — malware analysis report

Static analysis result for SHA-256 0024d2096b516f9b…

MALICIOUS

PDF

92.2 KB Created: 2021-07-14 07:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: de3c592ad136793ddd4c8fe52a14e82e SHA-1: 7d044351cbe4c70a4b50956d802ecc2b1a2d51b6 SHA-256: 0024d2096b516f9b7953693dce71ab4e3176ad4695035aa4e4180797b95c093a
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, with numerous URLs pointing to compromised WordPress installations and other domains, likely to redirect users to malicious content. The PDF structure and embedded links suggest an attempt to lure users to external sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/62dc0dd46779055b6e5199006d2dc634/lumitujixotesejumasopun.pdf
    • https://daismene.it/file/ruvotemubik.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/9u63vocnenoabp5a9rtbipucml/vusawisaba.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/q2c5o8fkju6bhvrbdmeo8luoj4/bijomaz.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b6b28fda0---40323564926.pdf
    • http://tea-ra.com/user_data/upload/save_image/files/nozuwunev.pdf
    • http://www.anjhimayath.com/upload/file/88081559859.pdf
    • http://agataklimowska.pl/userfiles/file/pepijasotegizuduvorizaxu.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801777123e2---dizitasotelaxasokidoto.pdf
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/negidupon.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/ijsjcvlgbdm6rgui271djqdivp/bolorafozulese.pdf
    • http://kmkonsult.cz/userfiles/file/78306238546.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16074179c90660---ximuso.pdf
    • https://tavio.ru/files/file/59812913841.pdf
    • http://valsadindustries.com/userfiles/file/jololobumuzejurutawude.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16073b82f3e7cb---jirasigoxolelu.pdf
    • https://moveo-sport.pl/userfiles/file/sexilezulerivadinoto.pdf
    • http://lhs60to70.com/clients/3/32/32806278e47d7e4d905c37b1d6ebf04a/File/27253586155.pdf
    • http://khamtribacninh.com/images/files/77834477614.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/dql54gc088cvdapfikl5vleic1/14219483390.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4a106e3062---pivamidonuzoxozezux.pdf
    • http://nail-free.com/ckfinder/userfiles/files/golituwesowosoj.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/786d0cb00a7fd6e5e95f1d318c146b00/wixonovogomorezetadox.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=simple+board+game+rules
    • 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_off000104ba.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x104BA 16792 bytes
font_01_sfnt_off00011ccc.bin
bc57db3a145471fec58216f1f1e1a601ac20d16815cb9e5386fd1bfc294bc5b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCC 17848 bytes
font_02_sfnt_off00014b34.bin
c70e093a7ad89113a251258d6274eb077a81e0d6df47e84182a86ca4158b19f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x14B34 10848 bytes