Malicious PDF — malware analysis report

Static analysis result for SHA-256 9600da2820605a37…

MALICIOUS

PDF

69.0 KB Created: 2021-09-12 03:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f3f330007cc63d2bd3a6525de1615a19 SHA-1: a89dc01fbf5de312db5dd2f4bca5afbf42af01ef SHA-256: 9600da2820605a377225e64420f4f7b20ed7677b8742df1adeab55394266cce8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, many pointing to suspicious domains, suggesting a phishing or malware distribution scheme. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is part of a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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 http://fizjoactiv.eu/Upload/file/dexinefeme.pdf In PDF document text
    • http://spakimthi.com/upload/files/fafenotaruneso.pdfIn PDF document text
    • http://ambvetsanprospero.eu/userfiles/files/76331310804.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/pojavipowazomimas.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613170e2c4b41---fapux.pdfIn PDF document text
    • http://e-junghan.com/userData/board/file/ruwajetajiba.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/babasafadudurisipojaditex.pdfIn PDF document text
    • http://waetsukai.jp/system/ckfinder/userfiles/files/89649454692.pdfIn PDF document text
    • http://z500.si/files/39417329418.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/24071172561.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/jexuwo.pdfIn PDF document text
    • https://majubesar.net/contents/files/65578254616.pdfIn PDF document text
    • https://pasarangroup1.com/contents/files/joduvalaxatu.pdfIn PDF document text
    • https://ooobelkom.ru/ckfinder/userfiles/files/70460186585.pdfIn PDF document text
    • http://zhongjiukeji.com/upload_fck/file/2021-9-6/20210906194816832875.pdfIn PDF document text
    • http://cuacuonductudong.com/upload/files/28144829233.pdfIn PDF document text
    • http://neoclassicalmansions.com/uplds/file/xesapasoliniriz.pdfIn PDF document text
    • http://vatlieubaooncachnhiet.com/userfiles/file/javukosefagajomok.pdfIn PDF document text
    • http://bnblspecialities.com/userfiles/files/81761522851.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/tulumajed.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/kosoxani.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/56424298189.pdfIn PDF document text
    • https://majubesar.net/contents/files/xajukibotufujevuz.pdfIn PDF document text
    • http://elverum-revmatiker.no/images/file/98369116927.pdfIn PDF document text
    • https://sibiucuratenie.ro/fckeditor/userfiles/file/40882676160.pdfIn PDF document text
    • https://menokatea.in/ckfinder/userfiles/files/36012882921.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=cat+mouse+app+for+firestickPDF 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_off0000b054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB054 14968 bytes
SHA-256: ae5da7c8310ee709c1991f70ec2d65cfb0dd2e23e7f38fcddc4491c40346ca9d
font_01_sfnt_off0000d5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B9 10716 bytes
SHA-256: 641524eaea47f9d8270e5f7d32f9a4753424cc5879be8b04c794a6f4c6532fdf
font_02_sfnt_off0000ee74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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