Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e67eb1200ab1c82…

MALICIOUS

PDF

86.6 KB Created: 2021-09-19 00:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e955684b085cfc16a33a849c42354a2e SHA-1: 069f8c1483ebb17ef07538b19499d0fb37ca22a2 SHA-256: 8e67eb1200ab1c825c6c8b5deb532481d20647c617bb843ef4aa0c3183865582
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to external sites, suggesting it functions as a link farm or phishing lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically highlights its nature as a non-clustered link farm on disposable hosting, further supporting its role in directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://coretry.ru/uplcv?utm_term=telugu+new+movies+online+watch+websites PDF link annotation
    • http://ippinnudon.com/uploads/files/69571106021.pdfIn PDF document text
    • http://nemochem.cn/upload/files/zowokomifepifu.pdfIn PDF document text
    • http://optimumnieruchomosci.pl/uploads/userfiles/files/55321955527.pdfIn PDF document text
    • http://studiotecnicoligioni.com/userfiles/files/tazolexufitukizegidiviti.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/68485887104.pdfIn PDF document text
    • https://dalba.net/other_files/File/35094902985.pdfIn PDF document text
    • http://nieruchomosciklodzko.pl/files/file/41473263158.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/gevirejomobaditufise.pdfIn PDF document text
    • http://ediliziaunoaventi.com/userfiles/files/82734432424.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/88627898662.pdfIn PDF document text
    • http://razredna-nastava.net/files/50084191169.pdfIn PDF document text
    • https://funcarele.com/ckfinder/userfiles/files/digojugavojimenelej.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/wibaporuduwa.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name/files/bujeri.pdfIn PDF document text
    • https://termofriz.rs/files/91426519526.pdfIn PDF document text
    • https://5udua.com/contents/files/pinijunoguvekeg.pdfIn PDF document text
    • http://lecieldesandes.fr/ckfinder/userfiles/files/nixufarewu.pdfIn PDF document text
    • http://bayernglobal.de/userVZ/file/31115354711.pdfIn PDF document text
    • http://nanoscopy.ru/uploads/files/tilakamosoju.pdfIn PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/dowigutexobure.pdfIn PDF document text
    • https://eliteplacementagency.com/uploads/files/tesosi.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614653ee19104---bagadejarad.pdfIn PDF document text
    • http://freeski.hu/freeski/file/kosikugabiku.pdfIn PDF document text
    • http://chi-kara.net/Upload/files/79806417212.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_off0000ecec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEC 10932 bytes
SHA-256: 8e3ac40c6c9f04800842480852b8ef85889ec39da615831e0b09a5aae4e1e140
font_01_sfnt_off00010629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10629 17832 bytes
SHA-256: 77c69af65a9fca3fdabbfe448c4d6049c71e1a0f9a06f5eac45a0b8f0d6d1032
font_02_sfnt_off00013457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13457 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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