Malicious PDF — malware analysis report

Static analysis result for SHA-256 49749bf19f5a825f…

MALICIOUS

PDF

74.5 KB Created: 2021-09-14 10:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 177d3dfe076585a9d2a3cc28673bbb44 SHA-1: 953412f65bceef1d78d3656994a755241197f22e SHA-256: 49749bf19f5a825fb6ae979cf8c29f01a554528cce771bc20a576a61ec7e0d12
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document contains numerous embedded URLs, many of which point to suspicious domains and appear to be part of a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the intent is to host or link to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133329eba809---rixewolixutemumot.pdf In PDF document text
    • http://thaihotelsale.com/FileData/ckfinder/files/20210912_75226CCAD8830F55.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133ae0dc4292---turel.pdfIn PDF document text
    • http://rvhifi.cz/files/file/70667790129.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/48920198261.pdfIn PDF document text
    • http://dongduong.net/Images_upload/files/23473352313.pdfIn PDF document text
    • http://mexxeopaint.com/upload/files/32763613751.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613d74e2cf359---87195830122.pdfIn PDF document text
    • https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/forifojediwujatabapuxepi.pdfIn PDF document text
    • http://giftboxvietthuy.com/upload/ck/files/6597090692.pdfIn PDF document text
    • http://ambvetsanprospero.eu/userfiles/files/90895337793.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/92000966133.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/ribopaduvaxam.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/49233449111.pdfIn PDF document text
    • http://stellarp.com/userfiles/file/tifepupiwasuwakiro.pdfIn PDF document text
    • http://feldbach-tourismus.at/files/bifiwifabepujizo.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/15507789389.pdfIn PDF document text
    • http://ez-surveying.com/htdocs/cljr/data/files/radadixi.pdfIn PDF document text
    • http://kocavietnam.com/upload/files/85806674513.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/2676892733.pdfIn PDF document text
    • http://szjwwj.com/userfiles/file///texojoveturasi.pdfIn PDF document text
    • https://beauti-full.ru/uploads/files/zofekowa.pdfIn PDF document text
    • http://ephtour.com/FileData/ckfinder/files/20210905_6C7E9A0C4A08495F.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=android+x+compatibility+flutterPDF 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_off0000b60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB60B 11052 bytes
SHA-256: bdb0ba2f7cee3c755b2ffd7ae858d0a754678f9b60cb203f45aa0998c4e56841
font_01_sfnt_off0000cf8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8E 20224 bytes
SHA-256: b95e889c45fb6e2fdbd047a1bcac0922ceb7bef62d3dd3459accb35b755062ee
font_02_sfnt_off00010462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10462 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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