Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9ace89f89c25a9…

MALICIOUS

PDF

78.6 KB Created: 2021-09-21 03:13:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5b15c6628501f8786f9f614bc2250639 SHA-1: be85a8e81e7dc055403dcfa65942e353c9ddfe0f SHA-256: 2c9ace89f89c25a99e60ffd88c0805499884c48f2a45a12660a94e54049f658b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm designed to redirect users to potentially harmful content, likely for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to obscure the final destination through multiple redirects and disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://huntic.ru/uplcv?utm_term=download+among+us+free+for+pc PDF link annotation
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/d7924bf48b4a5e59702f9b9ced6b8f20/15148687165.pdfIn PDF document text
    • http://chinalabware.es/d/files/48592177703.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/saxerudaxifagiwedejov.pdfIn PDF document text
    • http://hacsbathtarntaran.org/~/userfiles/file/18876252351.pdfIn PDF document text
    • http://steinbach.casawell.tw/userfiles/file/wexepu.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613af71e4f16e---jojezixuwunowi.pdfIn PDF document text
    • https://ratosatu.com/contents/files/papefenozapovulazuj.pdfIn PDF document text
    • http://snkpost.com/fckedit_file/file///20210919_9_56_25.pdfIn PDF document text
    • http://dentherapia.hu/files/file/legagowuduzatusemezavudod.pdfIn PDF document text
    • http://xsteelstock.com/d/files/libewosawuworaza.pdfIn PDF document text
    • http://www.mamafoundation.cz/ckfinder/userfiles/files/wirero.pdfIn PDF document text
    • https://lixtech.com.tw/ckfinder/ckfiles/files/mosizu.pdfIn PDF document text
    • http://bigbazar.cz/is/images/FCKeditor/File/vobanitejudazuwokagixipa.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/33710311375.pdfIn PDF document text
    • https://dla-pracownika.pl/pliki_user/File/29425526835.pdfIn PDF document text
    • https://j26clean.com/upload/files/mewagilaruxobi.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/zenelolare.pdfIn PDF document text
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/zotefidaxejevilekuzuxuji.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/kavobagiwomonew.pdfIn PDF document text
    • http://alphamarino.kz/images/news/file/wojajefikefamonuboparaf.pdfIn PDF document text
    • http://industrialdevices.in/uploads/pujakezezososi.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/6052401784.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_off0000cccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E3 10960 bytes
SHA-256: 6b1c219f2b88e2918b28f38c5480a9edb3c1fa4861ee24c97911297e43eb7176
font_02_sfnt_off0000fe28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE28 18232 bytes
SHA-256: 4632e821ba5709007a832fb69f1cb70838447e65210d923a1de1743a4cc8574e

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