Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b262380ab4a9f40…

MALICIOUS

PDF

80.0 KB Created: 2021-09-08 10:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 76faa0005ba16d0dda648912caafbc25 SHA-1: 0b5b47271a40b28672bde8ef0a8f0a99c6c9b5a5 SHA-256: 2b262380ab4a9f40d57e8a66878c3b9ff0b6deda839d46bb714025f70c4771f8
156 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many pointing to compromised WordPress sites, suggesting it functions as a link farm for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. No scripts were extracted, but the structure and URL analysis point to a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16098252cd0403---mebasuxogefuraz.pdf In PDF document text
    • http://hanleyresources.com/images/dinozigomevujuxu.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/navilufuf.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/zakuredizu.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16087464869988---8370781227.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/f318549b1eb82ac0c3683dfd65bb7fc3/kokawuk.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/kifurupotesuxenutisone.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160944f3e11667---7577655640.pdfIn PDF document text
    • https://waroproject.com/file/91416619574.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16089b3020c28a---74544508603.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/17128864163.pdfIn PDF document text
    • https://reniuved.it/file/dulajojogapisenadokiga.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/92857577738.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/naxuxufutoledutebu.pdfIn PDF document text
    • http://termosystem.pl/userfiles/file/bubasilavunabufigijega.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/lp9bohk89ngmf3h4460j9ktihf/xiwukiremelaf.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cef14e43743---fofibabizajujelogufe.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/5e61945676e63226b436248f1285af12/vabolixukikujuxekezunuje.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/zolipesexekolukuzunez.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608513a17f28d---62538047288.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/dupozoseni.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609476cccbe97---1548883823.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/3041e3b988308e2e27088dbc406f48f6/94673346513.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=muslim+names+malayalam+pdfPDF 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_off0000cd5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5D 10548 bytes
SHA-256: 518fcd0c796e559f81fc4b81d3af33a155ef6febf759afd2a4db2c94214ca7ed
font_01_sfnt_off0000e554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE554 19996 bytes
SHA-256: 2e5764f43299c7cbab2ee4a2b89bbb5ff2a59b7b7a4c1264e6e77836363c5a48
font_02_sfnt_off00011a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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