Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae780b0eeebc2c6…

MALICIOUS

PDF

85.7 KB Created: 2021-10-08 04:10:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0e23a5889b899defad8d9800c9265a65 SHA-1: 4e1e8c96ee4e32271872cfb6de76cdaf3e834e03 SHA-256: 0ae780b0eeebc2c6d1ad1e56c88b89015729e9c96d4eb74fefbe1ce412188ff9
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one heuristic specifically identifying it as a 'link farm on disposable hosting'. This suggests the PDF's primary purpose is to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://bahceneryaman.net/public/content-images/files/24346414296.pdf In PDF document text
    • http://n2nnetworks.com/files/others/81347881583.pdfIn PDF document text
    • https://euronet.stonavka.cz/webpagebuilder/ckfinder/userfiles/files/3620321702.pdfIn PDF document text
    • http://moscreen.in/cmsfiles/file/72610407997.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/58847061840.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/xatobuzulojaxezile.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/jibupojibaludib.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/58336584714.pdfIn PDF document text
    • http://www.veslovani-vsb.cz/soubory/file/57821692152.pdfIn PDF document text
    • http://yogaschoolofkerala.com/photos/editor/files/biresezudodudupebonopi.pdfIn PDF document text
    • http://donovaly-ubytovanie-safran.sk/web/userfiles/file/revavozados.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/fimekigizitizuji.pdfIn PDF document text
    • https://wlweb.co/sites/default/userfiles/file/79372629282.pdfIn PDF document text
    • http://alvit-bk.ru/userfiles/file/novukipamosasifaso.pdfIn PDF document text
    • http://twtime.com/uploads/files/202109042009384638.pdfIn PDF document text
    • https://cityface.cz/res/file/setagawam.pdfIn PDF document text
    • http://ambartakip.net/belgeler/file/52218487350.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1613aecb6280bf---zimirewenopigagogu.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1615d3d19c3da1---sereduvozu.pdfIn PDF document text
    • https://horizontire.com/userfiles/file/romuboxut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=different+kinds+of+machine+learningPDF 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_off0000e8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B4 18256 bytes
SHA-256: 165a3c1996ec3bf8ceaa0afbe7fe94337682d18ddf04a806c241fdf3bcbdcbc4
font_01_sfnt_off0001181f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13036 11016 bytes
SHA-256: 5dd884cd5daf2e70d035aae7fb08dc45d511b89a08824719b5dd83c882455328

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