Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce760899640d8197…

MALICIOUS

PDF

75.1 KB Created: 2021-06-13 09:43:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a182444477ca3b8e790a6bd7e9f16278 SHA-1: c2b6314e197bae63f2ddf6404f74bab1ff9b1b69 SHA-256: ce760899640d8197e0ce3567edbf3e3d4b6970e0e9b40f2e3d1cc9c090de6230
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload directories and disposable hosting sites. The embedded URLs, such as 'https://drafthe.ru/uplcv?utm_term=hud+color+elite+dangerous', are likely used to distribute phishing content or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=hud+color+elite+dangerous PDF link annotation
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c3da9050b80---5189340211.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a94e4961157---92098533230.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/26uoo33mdu3h81nigfu4me0gmo/lizolutomelaterarisinivig.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608caad988023---10039704294.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160734c197a201---41940292290.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/xupokidonezoval.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/36174e59a85bfac4ee03ec75c3ea5889/retaxuboxuzakirawudijoran.pdfIn PDF document text
    • http://www.knickmeier.net/images/pageimg/file/63094305340.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2fcaa6ecf8---74032615394.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a8ef8b5c3---vojubota.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/65221124962.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/1cfc43060bdea830ffd18ae003129733/12167024612.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16076a4451fe80---volezubovujowuxuba.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/4235669257.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/9bf24u5jnk00qgn58a6j9h6g4o/35338333124.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/lndt6r5vb8ibg3ast66sh7e1l6/43322056142.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65C 5068 bytes
SHA-256: 278b371ba2a3d82e7838d3d7713abc1a72aaa7b77158093d12e6a017a113314c
font_01_sfnt_off0000f7a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A0 11992 bytes
SHA-256: 7d519224afe895e3e8cb78f5ba98736373283a58607644a9ae4ea246bd8d884d