Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07c40b639b2c469…

MALICIOUS

PDF

79.0 KB Created: 2021-09-21 00:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ab0a061765e07dfbede745f9174153f6 SHA-1: 489e256e9713c5e3f26864e8fee8080df4098f33 SHA-256: f07c40b639b2c469de411ddcc0e13c65e92c069dbe4c775d6cda71dd692d2d8b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to suspicious domains, and is identified as a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and the nature of the embedded links suggest an intent to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://webinaris.net/ckfinder/userfiles/publics/files/37630003537.pdf In PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/42784463255.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/dikewalesarubut.pdfIn PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/govanogapulon.pdfIn PDF document text
    • http://landroverbh.com/ckfinder/userfiles/files/58717665788.pdfIn PDF document text
    • http://medicalproduct.hu/images/files/nuludebusolifadugitisodam.pdfIn PDF document text
    • https://usssecuritate.ro/userfiles/file/jenosabikofi.pdfIn PDF document text
    • http://nanoscopy.ru/uploads/files/kotujixapidofe.pdfIn PDF document text
    • https://ylwlgwadmin.ylwl.cn/upload/files/55210315422.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/161465fbc2254c---tijukibotu.pdfIn PDF document text
    • http://www.otevrenysklep.cz/ckfinder/userfiles/files/40742780067.pdfIn PDF document text
    • https://harmony.im/userfiles/file/2207569109.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/39866813442.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/9d1ef4120532e63496edd5088bb42935/lebemuk.pdfIn PDF document text
    • https://markaoyun.com/calisma2/files/uploads/24136860165.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/mekopagejiluda.pdfIn PDF document text
    • http://stopguepes72.fr/userfiles/file/42034840351.pdfIn PDF document text
    • http://refinerlink.com/userfiles/file/wutafugipujarewewu.pdfIn PDF document text
    • http://songdolandmarkcity.com/userfiles/file/85328516482.pdfIn PDF document text
    • http://mecaniquekd.ca/upload/file/32525629430.pdfIn PDF document text
    • https://jobtiara.com/files/files/39048725596.pdfIn PDF document text
    • https://zebcom.in/userfiles/file/gikaxugimufisoja.pdfIn PDF document text
    • https://adamant54.ru/userfiles/files/91978814349.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=naruto+shippuden+ep+40PDF 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_off0000c91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC91B 10720 bytes
SHA-256: bee52848494421c6cd40cf8f38fa3bf776e493ffafe20522509bafe2ed1da1cb
font_01_sfnt_off0000e1b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B5 20372 bytes
SHA-256: dd77a8da131d0c43e32ea90621a37e0a8540b4e791df766b756c8ef7b07b9e1a
font_02_sfnt_off00011619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11619 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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