Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2d98b45a425d0a…

MALICIOUS

PDF

108.4 KB Created: 2021-07-01 12:09:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 175f42792cb1b00f248a0d31af47584b SHA-1: 54bb8edf745db4234b40276a25c9975ed2030df9 SHA-256: fd2d98b45a425d0ad2f5d0dc87467d48c222ab446fb89cff345ad0982ccf98ea
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to compromised WordPress sites or use disposable hosting, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://beliangka.com/contents//files/10477609196.pdf In PDF document text
    • https://deltagroup.bg/uploads/file/71028445146.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/runusuxelezituloreluf.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f40f5c4393---mokaxepamonexafavewalokax.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/655cdc2f55a9585c9243b9b8105020d7/fekotakiteme.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c954c1377d---ridomuzuje.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7780882bc---17575454699.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16090f43b6de3c---49276475552.pdfIn PDF document text
    • http://guilfordvikingsclassof81.com/clients/4/47/479b0a304b4cdce99dfe3eda73a59016/File/73035811851.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/r464gdb2sgg3r4vlf6bkkts035/mugarorudatowogezu.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16089202619372---sojatobukasetojuvi.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/7edos5694vc15n3hopi9pdpctm/kelogel.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/37249068710.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076479c1cd76---wiwukagezagovepupa.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16091cc5134cbe---95554151003.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/h34s7k3pifvk83pfcj5ei74evn/ronewisisaxedamelelo.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/wozapir.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba86933dce---35539246360.pdfIn PDF document text
    • http://amdind.com/userfiles/file/4444802658.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/fudowisomifigowejafon.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/437a8a3a179bc58d3cbebef449d988b3/kadumovexative.pdfIn PDF document text
    • http://desagresbrts.com/clients/34568/File/gozemaped.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddfa8d9bc3---8368088136.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4ce5999e7---daratopuvutedipeladig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=map+of+waterdeep+areaPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000146b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146B6 17820 bytes
SHA-256: cfbd060b7b23e4ca212b03fce9a219eadad700771f20ff66b8640c8b43fed1f2
font_01_sfnt_off0001757f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1757F 10160 bytes
SHA-256: 4b645eeafb628d6d9f159c2eed37d7a6af3959a4f1e5c4dc71930fe1843d2d8e
font_02_sfnt_off00018c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1