Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f927f8f5c7665a6…

MALICIOUS

PDF

82.8 KB Created: 2021-07-29 17:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ef84be9a3eec7a15c16fde6b13df518a SHA-1: a6c7cca4117225c4b93df5e050a820a09cb67341 SHA-256: 7f927f8f5c7665a668723c7007edc4042a09539064bc155a7a0071138cb12ef4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links to external resources, many hosted on compromised CMS upload directories, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae8be5d831---4303039638.pdf
    • http://studiopetrilli.it/userfiles/files/26300323383.pdf
    • https://burstallconrad.com/editor_files/file/kadafiz.pdf
    • https://2acontractor.it/images/file/legufibitumir.pdf
    • https://lienlacanien.com/img_pages/file/12227699814.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/bd2bfa25d58656ee9eb79cb8d8766a26/78237873488.pdf
    • http://doggystylzgrooming.com/admin/photos/file/2415633421.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6165ad86a---83381711313.pdf
    • http://ahlhy.com/uploads/file/190131335179.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16099b7ca09647---rokiwitib.pdf
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084e41b17bbd---74451486295.pdf
    • http://www.chatanakonci.cz/userfiles/file/31524325879.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/kv6tejq2o2frb1il119rmcp7oa/bivokitoxubon.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100173c9c1c9---86968338146.pdf
    • http://wenxuezj.com/images/File/vikir.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1607e76503a7b8---47167093526.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/085lrgij37m5qk89hd7vkp37c3/kupixususat.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/97ebbd1ce1172afbb9e27f20161353e8/gatetodoj.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16070864346a8a---12249918465.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/76c57efd94d1b175d3b11cff0f436b3f/20371112162.pdf
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/acaa2e32987c3a6aa85fc4f976bc9810/mazitivipidiziforose.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e33876d349a---dukepepidejigelu.pdf
    • http://sushigonewildtogo.com/uploads/files/kapas.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=download+b%C3%ADblia+estudo+pentecostal+gratis
    • 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_off0000d91d.bin
2c31a7e7ca8f6485e63e7759c61c60ebd2295af78468550f10206e4abb103718
pdf-font-stream PDF embedded font (sfnt) at offset 0xD91D 19196 bytes
font_01_sfnt_off00010955.bin
c1b0684c33a614ce953949a0da68089dbf1e59a30f01082a085adb3f076586c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10955 11080 bytes
font_02_sfnt_off000122e1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x122E1 16792 bytes