Malicious PDF — malware analysis report

Static analysis result for SHA-256 066d806f11f5a354…

MALICIOUS

PDF

70.0 KB Created: 2021-09-13 23:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 04017c3e78c1c7ccf899c822a6b87579 SHA-1: 420de47b7890c6ca053a7711260fb77a5ef61e0a SHA-256: 066d806f11f5a3540e55cce65ffe6591d4478b94e734af147819e0566982e949
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It impersonates a cloud document lure, suggesting a phishing or malware distribution attempt. The PDF contains numerous external links, including one pointing to a suspicious domain, which likely serves as a download or redirection point for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://preiss.at/upload_files/files/fosuzajurufufujiremuga.pdf In PDF document text
    • http://i-akparat.kz/ckfinder/userfiles/files/16812731107.pdfIn PDF document text
    • http://ttc-investco.com/img/files/65451777609.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/36132186678.pdfIn PDF document text
    • http://tavio.su/files/file/keduwekewiwus.pdfIn PDF document text
    • http://bentleyplemtech.ru/userfiles/file/woxulojunadupasez.pdfIn PDF document text
    • https://mobspace.xyz/web/img/podborky/files/bekixomawerug.pdfIn PDF document text
    • https://bakwanudang.com/contents/files/jawisujadilib.pdfIn PDF document text
    • http://hoanggiaphatstone.com/upload/files/84346886883.pdfIn PDF document text
    • https://ghnservizi.com/file/jigopanijokoredad.pdfIn PDF document text
    • http://studiosaletta.it/userfiles/files/66619007998.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/tegajez.pdfIn PDF document text
    • https://globaltranslation.com/demo/global_translation/beta/userfiles/files/99318865372.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=install+zip+file+on+androidPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000afa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFA6 16884 bytes
SHA-256: 0a9da17929d37bc43ad88c71986c6f9413af9de1fd3157d5f3c45dfb18a0a6cd
font_01_sfnt_off0000db54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f36b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36B 10504 bytes
SHA-256: a504cee9f0fabefa384a73064561db2dd2443fc2677820bce2bbc43b2ca4e2d4

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