Malicious PDF — malware analysis report

Static analysis result for SHA-256 697e5a115f0e9d6d…

MALICIOUS

PDF

89.3 KB Created: 2021-07-14 09:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 8972ab219bcc6ac9a7a3219c236b3ff3 SHA-1: d566cadf2033297df9c08e73f977e4eb5a38a4ff SHA-256: 697e5a115f0e9d6d06ab0681d1b542269a62627e70bdbd548d2faf6c616b4f70
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains, likely intended to redirect users to phishing pages or download further malware. The presence of multiple external URIs and the nature of the detected heuristics strongly suggest a malicious intent to exploit user interaction with these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://drafthe.ru/uplcv?utm_term=tzar+of+russia+list PDF link annotation
    • https://belloverde.net/emailer/file/nezexenapobuno.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/wumamuj.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160daef3355743---datolevaxozinirog.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/c9e6f826641c26455bf5062461f73b0a/nupubetije.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/0f85746c329092fdc846d11a75d3f254/25607484454.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c8f60b2f8---86470156912.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c17c89d6839---5204959498.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c52fe086d---rototipulig.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf1c0c2d4d---38653176305.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfc7a3c48b---muguzijolizalokol.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/81466167780.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/4c53e9f4dc970c19edd8994ae8da1af4/6919237372.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/280285c45823ac68b7542a2f71c1a581/32218845472.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a309563fb---pedinetiwuzu.pdfIn PDF document text
    • http://belgium-ex.com/images/blog//file/48720656425.pdfIn PDF document text
    • http://banghaija.com/userfiles/file/1578291669.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/d1da335aff1ff945752f1631b826ecd2/bozizepikokes.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/bofibojeneliziterapegofa.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/bmtqgrdqgn07p86grsrmqso694/vitenaderefibulosagipo.pdfIn PDF document text
    • https://comfort8889.com/upload/files/86572530005.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/29824636f47e21294d0cc7793a086223/35322918150.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160b0fc1243108---busafariwufax.pdfIn PDF document text
    • 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_off0000fbbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBB 18040 bytes
SHA-256: 8f0f5f464e61f53d720a9b98a7c7e472f5c1949daef647eeae0b78eba6011089
font_01_sfnt_off000129e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E4 10092 bytes
SHA-256: 279e932115b99c4ce73f25703074938cdc5e62cccff51e7017d5e4a1fa496c32
font_02_sfnt_off0001408e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1408E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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