Malicious PDF — malware analysis report

Static analysis result for SHA-256 7569eacb1ed6f90f…

MALICIOUS

PDF

84.8 KB Created: 2021-09-09 23:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c530eb11e1a7c043fafa8195b69b905f SHA-1: 069f6dc4bf31973001bacbff5c32a80c37cd511e SHA-256: 7569eacb1ed6f90ffae958c21ef843b2978f37884a0abe262fabc5565ef6e0ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the URLs and the PDF structure suggest potential for JavaScript execution to facilitate redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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=the+snyder+cut+torrent PDF link annotation
    • http://trunglam.vn/uploads/userfiles/file/5978635182.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138cc7d6a599---pebegapotipufe.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/96581425349.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/631333e46434848b091adb795b14c91c/25907698184.pdfIn PDF document text
    • https://khoahoc.timviec365.com/picturesfiles/58866756570.pdfIn PDF document text
    • https://interior-mark.com/ckfinder/userfiles/files/92341594777.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/62788345347.pdfIn PDF document text
    • http://olguanaokulu.com/upload/file/10570121829.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/46938294922.pdfIn PDF document text
    • http://cke.hk/userfiles/dijovimarajezito.pdfIn PDF document text
    • https://jager-ig.tw/up_photo/file/tinakukupakaxenutu.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/12095745328.pdfIn PDF document text
    • https://ph2020.org/ckfinder/userfiles/files/1500328127.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/35589791161.pdfIn PDF document text
    • http://licausi.it/userfiles/files/faxepupute.pdfIn PDF document text
    • http://topp.pl/_topp/file/78188780220.pdfIn PDF document text
    • http://dade666.com/userfiles/202109file/2021090300260270554.pdfIn PDF document text
    • http://tsraccountants.nl/mailing/images/photo/file/walexobuzelikoriwef.pdfIn PDF document text
    • http://vinhomeshaiphong.net/app/webroot/img/files/rufidakixidoku.pdfIn PDF document text
    • https://hamasataccessories.com/userfiles/files/dusebakibutewodu.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613352141092b---39945313414.pdfIn PDF document text
    • https://grnca.org/img/files/files/93954031130.pdfIn PDF document text
    • https://a-guskov.ru/uploads/files/40698592078.pdfIn PDF document text
    • http://kitpaisal.com/mypicture/file/wenetikobimebigono.pdfIn PDF document text
    • https://kompaspt1.com/contents/files/22574695362.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_off0000e406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE406 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC18 19352 bytes
SHA-256: 206731f8ee03cda94ea89ac96ab2cce5d43f9471ca9466dba88b126826790315
font_02_sfnt_off00012e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E12 10344 bytes
SHA-256: 8c4284ea44ea4c0f703ccfd6a5acec0b15662783489538a4e435d572ed23b24b