Malicious PDF — malware analysis report

Static analysis result for SHA-256 e54192145d9d280e…

MALICIOUS

PDF

83.0 KB Created: 2021-08-14 23:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 84ac596d0cf360abb5172757fe5fc22c SHA-1: dfd38f3c5e54a31f18ee412150e85d8bb527b5e4 SHA-256: e54192145d9d280e3d087b3511e43893d7fe7c8a0b337ebf71f5d0a5df6d7731
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely involving exploitation of PDF vulnerabilities to redirect users. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware delivery campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://garglob.ru/uplcv?utm_term=modo+de+produccion+socialismo+caracteristicas PDF link annotation
    • https://bouveau-consulting.com/userfiles/file/loxipififutoz.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/at5on50gqbhmupul0kms8r6q0k/dorejoselipi.pdfIn PDF document text
    • https://avela.md/userfiles/file/futotimafuxo.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/kqkr5db3elp62uhs4m1bj31tg4/92952940490.pdfIn PDF document text
    • https://deepankarbasu.com/FCKeditor/file/74983440449.pdfIn PDF document text
    • http://ibb-online.ru/f/file/zusurafoweperel.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/vanidafoxakapepas.pdfIn PDF document text
    • http://ellev.fr/upload/files/69567694215.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/75bca2e71dd939c26a18418642bd10c7/jivozumitedusewokiju.pdfIn PDF document text
    • http://better-pharma.com/images/file/files/vufitajewivelabipazesekif.pdfIn PDF document text
    • https://ganport.pl/userfiles/file/86127991351.pdfIn PDF document text
    • http://slsnn.ru/content/file/bidexuvorusetobagagizaz.pdfIn PDF document text
    • http://hydrem.ru/images/file/26484558696.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a8eb8c7bc---lelarixanepepoga.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/5fddf06b414ba14b2adab563ae1c4f65/vadaj.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/veduximoko.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607fffc704efe---97928622965.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160777f44e57e1---mirobibajegopiko.pdfIn PDF document text
    • http://www.predia.cz/userfiles/file/31406964828.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c927a370eba---gujatibidofar.pdfIn PDF document text
    • http://resheto.ru/users_images//fck/file/17570934747.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a77cc9ef26b---teluzuxozo.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/0kc59v98ngaq1bc2q1s8mj4cbj/zipegifizuwow.pdfIn PDF document text
    • https://ldcpc.com/ckfinder/userfiles/files/13661116540.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_off0000dfcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCB 17136 bytes
SHA-256: c5f3b905ff128378a77610b14af059c644561c096102b9dea4d075b968803bda
font_01_sfnt_off00010b11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12328 10768 bytes
SHA-256: 0df1d451d4d12d43f19af99de1ca55d60c036ed5920026a2e43071b9fb1316e4

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