Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8922601510340b5…

MALICIOUS

PDF

119.0 KB Created: 2021-07-22 01:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: dc374b89310049a8c6f58c04459b9d14 SHA-1: bcf23083419304c93be90806c8f2a1f8158bf81b SHA-256: a8922601510340b57981bff4867f1d18431ab0d8ce08fafdc01c00e4239bb225
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malware or phish for information. The presence of numerous links on disposable hosting and the use of UTM parameters indicate a coordinated effort for SEO poisoning or traffic redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://gilbertthomasreunion.com/clients/5/5f/5f56fe696be94dde62972871c8a9bc28/File/71726668898.pdf In PDF document text
    • http://hopkinshigh1988.com/clients/75739/File/72606840463.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/ee69c6d4cae39787bef7d5e682b83310/zokokebukalumuk.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/89ahia1957srblhm1uvt2osd56/96690474294.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aac4c69d683---13934431140.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/u5v6bfgnm95jf8o8jih5r6s542/28078647556.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/f1f96e8022c04bc1a93cefcefaebbe86/83061196175.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e4ebeedc8---66866682592.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image//files/44351750609.pdfIn PDF document text
    • http://emurus.jp/userfiles/file/89350994006.pdfIn PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/mimuxuxeruvejalinuwosu.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7jmndacof37ni7plbhj989f3n2/xodogegufin.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/75406542172.pdfIn PDF document text
    • http://cheumst.com/upload/fckeditor/file/48821280565.pdfIn PDF document text
    • https://mimpishio1bet.com/contents//files/jutigazofadirotokixe.pdfIn PDF document text
    • http://odessahighschool1970.com/clients/7/70/70263b1be1b93b62200e198143f59f20/File/72061561367.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/tikimofivikukosamo.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c6eeda644c4---62217376679.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d30db886e3---zanevufotejakapitukitol.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/312a2350f148c0395b04eb14844f4af1/51263794644.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/71518711407.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/plaktardpi8b542enb0nu863a4/55443909009.pdfIn PDF document text
    • http://hotelstrack.com/bot/ckfinder/uf/files/kiponud.pdfIn PDF document text
    • http://citescolairedeledit.com/include/file/loranuzigifeb.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/f0a7b75e9b72520fb30ae2aab122523a/24167246480.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=cool+screen+recorder+downloadPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000165af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165AF 18464 bytes
SHA-256: 80d0c60437418d579c8f4b5876b2d40af11f98cf5c15441a2b3452ca230894f6
font_01_sfnt_off0001960e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1960E 1668 bytes
SHA-256: 0a4af374cb035e676210909e4790276a619635896d879aefac6ffd5912e9aefa
font_02_sfnt_off00019e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001b619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B619 10288 bytes
SHA-256: 9d9ca7902efe45f7d995252f03ec8e746b430dff03b313f0722edc06b08a63cf

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