Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ddb588b32f0a924…

MALICIOUS

PDF

88.3 KB Created: 2021-07-01 10:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a41105ebf14ccecab1b4276f49e8e1ca SHA-1: a0847e6c27cfa7c2ea1533ceb61178b501f68090 SHA-256: 6ddb588b32f0a924eb606012445f60d279d10fe11049219a9f81df05ae13fb1b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect users to malicious content.

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://allytemp.ru/uplcv?utm_term=30+day+cancellation+notice
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2f511cdda---wejufidadiki.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/a358fbc22849f42879260d3ebd4cfd4c/30797769758.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082715389ed9---94635945718.pdf
    • http://vom-ragnaroek.de/uploads/file/vonufapegim.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/ae642d23546bc1476745cf5c2658463a/pekawemudubofezejosagil.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096d663b586a---28475892171.pdf
    • http://mnarch.it/userfiles/files/bafipifavuruvavuwo.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160acf98501216---lelanukasunid.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/b607f5c3e6967272a164a49d63587a14/93959828584.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a02cf03dcc7---23123385668.pdf
    • http://olsztyntransportmedyczny.pl/userfiles/file/dunepixegovesafo.pdf
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/taxoros.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7e6307250---9286728141.pdf
    • https://dodatnagarancija.com/userfiles/file/tifomewebipozasa.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bea59c43be5---luzunatoxa.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a811c11ed6---69349143419.pdf
    • http://oreade-breche.fr/userfiles/file/jozabofod.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609024e1f311c---bugarexaw.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/um9gm0m7logt414mpu8rhl2c27/wemuvokijunumefipesaminan.pdf
    • http://trungnguyenjsc.vn/uploads/image/files/sixufifiditagogegovik.pdf
    • http://alphasigmaoverseas.com/userfiles/file/18252367128.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/c98cfda02e70385459558172d63d2712/gipizun.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1289931b2---totizaderezaz.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7e0917b02---20371657402.pdf
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9111e629ca---gesoleradumer.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_off0000f746.bin
751aaf976f4b8844d0befb8143029eb3ac99054eb674a83d12dfb01f05e5ad04		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF746 17056 bytes
font_01_sfnt_off000123b4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123B4 16792 bytes
font_02_sfnt_off00013bcb.bin
4aaa3726e0f44eb4b9c8cad5f157c109bf1a89281312e2fe5c3631750b8bd6fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BCB 10408 bytes

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