Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dabc705964982dd…

MALICIOUS

PDF

82.4 KB Created: 2021-09-05 05:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2c7e24c33105ee9671d599de10f4783f SHA-1: 6a652be0be16a3ad21ff8c02ed08402f36a97866 SHA-256: 2dabc705964982dd7f18dfe33e5eb6c7eca2d1d3d84c3353001e75daf0dde800
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload directories. These links likely lead to further malicious content or phishing pages, indicating a multi-stage attack.

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://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/grbgrlo2dj4rlleejoivd6k63v/65903999742.pdf In PDF document text
    • http://ksnjl.com/userfiles/files/92050059416.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607638db25f05---dizorif.pdfIn PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/lozuroruwamobu.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/2830be7ad3f1fe366d4528b55a712784/xuwenidum.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1609785e5e3011---7533007461.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/83601053108.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/71039002207.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/0511000938eccb9508bf39d7dcaafb3e/xuxogulupizigabifamezok.pdfIn PDF document text
    • http://vakoplus.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/zuvadumopuve.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d6e4e9784---tunefamorevo.pdfIn PDF document text
    • https://himanshikitchen.info/viking1/uploads/files/91692822729.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/duxafazufovazog.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0df7a8edd2---setelotol.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/53813813192.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/8dfaa8be0a0564496c8b165b51cfef57/70581672229.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1380f1a15---59084128731.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16080878f14299---51962164341.pdfIn PDF document text
    • http://kpghomerepairs.com/uploads/image/files/tenajutegazemebesumojexo.pdfIn PDF document text
    • http://alltechsro.cz/files/77927054086.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d3dc94d41---49329579093.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/a64a4ee80360da75d31f1e5fdd310ad9/92596895312.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16077a9bec5430---visozopuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=ssc+descriptive+english+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_off0000dbcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DE 18448 bytes
SHA-256: 4af8d89db224fb3fe30e6202707c32d49c90af1738b310c850e6120c399c13c9
font_02_sfnt_off000123ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123BA 10756 bytes
SHA-256: 989ef0608e9793316158200af8469b7445b1d9e9c072dac86df08d92096006bb

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