Malicious PDF — malware analysis report

Static analysis result for SHA-256 5934a98714bcc9ed…

MALICIOUS

PDF

81.6 KB Created: 2021-09-10 23:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e84b0f78eac79bf50a05034b40a9b057 SHA-1: 10b1a74fa435dcc125a07befb2ca5c11e0669577 SHA-256: 5934a98714bcc9ed569e39cc7d39705c6e065a801036cdf5f84802915af113cc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as a phishing trojan and ML classifiers indicated maliciousness. It contains numerous embedded URLs, many of which point to disposable domains and are likely used to host further malicious content or phishing pages. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic confirms the nature of the PDF as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme.

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 https://smidgel.ru/uplcv?utm_term=would+bangs+suit+my+face PDF link annotation
    • http://encino.ilovepokebar.com/uploads/files/66828815173.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/lerivelafakezebezawav.pdfIn PDF document text
    • http://boschvietnam.com/files/usersfiles/files/wipojoviripabu.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/muxekokunilisejijebalonuk.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/nipekelamizelotogowiko.pdfIn PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/68109041279.pdfIn PDF document text
    • https://ceramicasvillaflor.cl/UserFiles/File/37340775651.pdfIn PDF document text
    • http://thrifthelp.com/flash/thrifthelp.com/file/gupigitunomu.pdfIn PDF document text
    • http://muaah.ca/userfiles/files/fagufazonibabomutakaperoj.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/28686028140.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/moxavurobuto.pdfIn PDF document text
    • http://fs-select.com/images/blog/file/metujowepavujotumob.pdfIn PDF document text
    • http://ccshecea.org/upload/files/banesujadele.pdfIn PDF document text
    • http://ain.proximeo.com/ckfinder/userfiles/files/mofanegarufenugowawixalaf.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161323e27b9310---misuxubovusiti.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613b325a0d673---92502334807.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/13165529694.pdfIn PDF document text
    • https://regiefranchet.fr/userfiles/files/danudojifadenofu.pdfIn PDF document text
    • http://tcyy88.com/userfiles/file/2021090901020173499.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/29067892811.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/vugokabise.pdfIn PDF document text
    • https://egyediajandekotletek.hu/mvc/userfiles/file/dodot.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/manegiwabirelafosisasef.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/kepipuwizovubagewafetirod.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_off0000da69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA69 17036 bytes
SHA-256: 5c7ed5292856a1df26b61d268d7a14786b315e4292b9ad2f16b7ee87f2a59e42
font_01_sfnt_off000106f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F8 11064 bytes
SHA-256: 4b0141c5b72b22d7fed9581d1f503a963d222f5456a2c5ed97e5b64835fafaa7
font_02_sfnt_off0001209d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1209D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1