Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d58626d56217309…

MALICIOUS

PDF

82.5 KB Created: 2021-08-26 02:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 76e5b69badf4b29cec52010e1d119f2f SHA-1: dc3d8a1408938a499db52345d5ed91513f18de06 SHA-256: 5d58626d56217309da59063b2aadd65b2721a07813422899044c115e946ea5ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs, many of which point to compromised WordPress sites utilizing the Formcraft plugin. These links likely serve as a link farm to redirect users to malicious or phishing content, potentially leading to further exploitation or credential theft. No scripts were extracted, but the PDF structure itself is indicative of a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=the+lord+has+risen PDF link annotation
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16079ff27e440f---99599728316.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085be8886fc2---80221250697.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/89286257214.pdfIn PDF document text
    • https://leciv.fr/uploads/FCK_files/file/38998915161.pdfIn PDF document text
    • http://train-in-japan.com/images/blog/file/26539479492.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16092c398e3f94---nunovogadepuxil.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/3d59220f1909afd9886bc2aeb33aab00/mojogaxosojijef.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/96f8183b532c928b119533b7c131a0b7/37447583131.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-8-11/20210811012405662153.pdfIn PDF document text
    • http://www.ez4parcel.net/upfile/files/2021/07/04/68474052781.pdfIn PDF document text
    • http://kovovyroba-nosniky.cz/UserFiles/File/81008527947.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/96e86184c8c6aeb96b9ded227fdbe898/45764614391.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/uki5u8cvofm6d65v5f73fmasfq/819902159.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/33d0c63956389b119d567639fc22bdcc/57114801522.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f8aeb09ca---99021450372.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/92243712241.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/do7s1s1f89ep3gnnoq7odv9g34/xabovegixomadupelewasaweb.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe62149f71---bawowonoxerinuranud.pdfIn PDF document text
    • https://gitteszoneklinik.dk/ckfinder/userfiles/files/72803892875.pdfIn PDF document text
    • https://mosaicopeoplecorporation.com/ckfinder/userfiles/files/25160004215.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d75ea3f29f5---dakawozutewipipulofur.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/960d9cecad1eeaf577af1c56a2b24c2d/pitiwekutigepug.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160900d3c39246---43761453665.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/d618e6e49e6894ea725076bb6d5e82b9/86271082769.pdfIn PDF document text
    • http://manu-transport.com/documents/file/jelatolodux.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/nugitogibagik.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_off0000e09c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AE 16924 bytes
SHA-256: a0360e36700be6e2ad3a36c52993b97f87bf8088ad62f870a88ed672b8f0ea4e
font_02_sfnt_off00012474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12474 10208 bytes
SHA-256: f6fac7755a384e51b1f56336eaa14af39efc84a75897dc190e9a4226fc18689e

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