Malicious PDF — malware analysis report

Static analysis result for SHA-256 9503ce7ddda47b7f…

MALICIOUS

PDF

84.5 KB Created: 2021-09-20 11:04:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2ed5f76d1ebc960b4148f3f1f41a9863 SHA-1: c9be66a3645bca0abf5a4a19f1bd3d5a0b6568de SHA-256: 9503ce7ddda47b7f19b28110350907ce564f8d8ecc8bbf2c5b4879333c822933
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which point to unknown PDF files, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and embedded links are indicative of a phishing lure, likely intended to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://rcp-ranstadt.us/files/regavunok.pdf In PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/kukifidex.pdfIn PDF document text
    • https://sicurezzaips.it/uploads/file/wesununipofomadovade.pdfIn PDF document text
    • https://aspit.ro/imagini_ws/duligalibagam.pdfIn PDF document text
    • https://olivermilk.vn/tctt/sites/aaa/file/digezaz.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/95963482409.pdfIn PDF document text
    • https://zhavezbozi.cz/data/file/39502304267.pdfIn PDF document text
    • http://sziszolg.hu/editor_up/xositugo.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/4264985046.pdfIn PDF document text
    • http://auswallendorf.de/userfiles/file/79548837037.pdfIn PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/11219293711.pdfIn PDF document text
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/25338788203.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e28e5ba4e---52396056433.pdfIn PDF document text
    • http://bakersfield.thepokeluau.com/uploads/files/bopunitinutatiwatewirafox.pdfIn PDF document text
    • http://xn--80aap0abfiql8h.xn--p1ai/admin/ckfinder/userfiles/files/lizarodufonixirebebefi.pdfIn PDF document text
    • http://delve-cr.com/uploads/82974744140.pdfIn PDF document text
    • http://webspace.mysdam.net/images/newsletter/files/povoxedexekurisoxavupat.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/9134149496.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/xofiw.pdfIn PDF document text
    • http://tndgdemo2.com/ckfinder/userfiles/files/fexef.pdfIn PDF document text
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/31217342264.pdfIn PDF document text
    • http://pomelieagency.com/userfiles/files/96674024567.pdfIn PDF document text
    • http://golden-candies.ru/webroot/files/files/93703181771.pdfIn PDF document text
    • https://groupekineconcept.com/userfiles/file/41422779653.pdfIn PDF document text
    • http://vectorma.ru/uploads/assets/file/danadukenipiwapaka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=motionleap+app+free+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96F 10400 bytes
SHA-256: 8af033bdfba11399f15f93eaae0bc0c03930838317d5155a9cbb3fbf64798425
font_01_sfnt_off0000f11a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11A 22008 bytes
SHA-256: 10f53e2dccd3d572d4de68d02a8dea2037d14412bfee570e5a982d56b120a715
font_02_sfnt_off00012b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1