Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e27873bce5bb99…

MALICIOUS

PDF

81.1 KB Created: 2021-08-20 19:58:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: b6413c021963e4659315b0e71bd26034 SHA-1: 7b6f494e33ffb2c972e51f3f2bc2ed4f20a2d03e SHA-256: 05e27873bce5bb999c92217fa97af1c3ad24aef80f5e5e3b2f7b5a0bec98193c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting, likely to distribute further payloads or phish users. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to lure users into clicking malicious links, potentially leading to further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/5ab7091ccc6224b2bdd6460a5a84341e/kaguxitaduwokaw.pdf In PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/q27bro0cto8qmvif7tgfa5h6fv/87607369145.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/bafelojubu.pdfIn PDF document text
    • http://yalcinsezer.com/upload/ckfinder/files/bogidupodani.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842baf2e5bc---59431776879.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa34da12306---44300226343.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071dd2ca7531---93385093364.pdfIn PDF document text
    • http://risorsaterra.it/userfiles/files/6148045687.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847c4a5bc4a---budusepaxajot.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/90142912416.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/65406435828.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160df25d58da94---wotisosawenazef.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608448c42a0ff---boxenad.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/ebeb588f71c08a92ee0de16a5ccf932a/77362976557.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608513e750fbc---47794229171.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b9bdfb72e69---jasibesevufimufovoneg.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/fesovanu.pdfIn PDF document text
    • https://edouardweil.com/userfiles/file/sedafiv.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021052214542431.pdfIn PDF document text
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/xanurabakanemigu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=fusion+360+files+free+downloadPDF link annotation
    • http://janyska.home.pl/_mjanyska2013/fotki/file/85621903613.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_off0000d891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD891 10876 bytes
SHA-256: f9b71bc3798db4a8807b2aa1a248c4667e605bf8ef54503ccc24c8a94238ce27
font_01_sfnt_off0000f1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F6 17296 bytes
SHA-256: b4e1dde10b5088f3dad5d979f4fca669ae7963f1de3f9e54ab338f9f27d9ec00

Open this report in the interactive analyzer, or submit your own file for analysis.