Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eaa057625825f4c…

MALICIOUS

PDF

86.4 KB Created: 2021-06-27 06:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 85ffb73c28d3149eff8f40d727042d6c SHA-1: a2bf57596055c870ffe03df5b7411ee696e4cc7c SHA-256: 6eaa057625825f4c9baf9acfbfdcfe8df265bf73a96b53f71e546cc0bf658a99
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains multiple links, many of which point to compromised WordPress sites hosting PDF files. One prominent URL, 'https://catamma.ru/uplcv?utm_term=fortnite+world+cup', suggests a lure related to a popular online game, likely intended to deceive users into clicking. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • 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.
  • 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://catamma.ru/uplcv?utm_term=fortnite+world+cup
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721dc956590---65022092041.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/qa5gkapmevoi11s3lt037j3oe6/fikazutovakukan.pdf
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba3694f459---59140324352.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/b8395adc4356771452371882a47ceef6/88129100512.pdf
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/5d3fb757d9ce114149a90817c6b533b5/sirazubizugarojifar.pdf
    • http://littlepearlbooks.in/data/eimages/file/99804956183.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16078f8492574f---16172188425.pdf
    • http://ebsenglish.net/_UploadFile/Images/file/78577335666.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/7595199e410e1873e9d88b9e620cbe30/46632522293.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/d258ee4ec7d69c5c9b16bb17d4553d92/demaganinuvizaj.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/nviad0ktelm4on8h7biso05uv2/17361763572.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16076559062e4d---vepadifixipow.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9c388e2fb---morijigexupupetakuwe.pdf
    • http://s-moonlight.com/CKEdit/upload/files/9423218956.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e789d3e23e---xigawopufixago.pdf
    • http://joy05.com/_UploadFile/Images/file/98643879455.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/032a232a5976df10c5db089550f9d8f0/73795431617.pdf
    • http://paillasse.hu/userfiles/file/pamapisojabikek.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5531c030b8---47757271620.pdf
    • https://oklogistic.lv/upload/file/18009072605.pdf
    • http://afgventuregroup.com/cfiles/file/27024655068.pdf
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7802f2f7ef---83351072249.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_off0000f03a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF03A 16792 bytes
font_01_sfnt_off0001084c.bin
e6936c944797c9786e637872ca0eec7b0c38e7b35f0bc0bc9fde9574d1a25c1f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1084C 17248 bytes
font_02_sfnt_off0001352e.bin
cc24752f1ee0a56e895e3cc2fb1e1270f14eb42dff69a56ff27c9931aecbbfe2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1352E 10340 bytes