Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee002ad0a54e8b4…

MALICIOUS

PDF

72.8 KB Created: 2021-09-09 03:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 501eec59adfc6b24c33d2561b6b9cd91 SHA-1: 4be8a7c08bf3c32d871be61b893e013dd72cf877 SHA-256: 6ee002ad0a54e8b4bd15d4d899dfbdb8d8d8c8b5e2762d21604a68bb4583bff6
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://vas-vill.hu/userfiles/file/mukanuxipozepixan.pdf In PDF document text
    • http://kochamsushi.pl/UserFiles/file/59601747537.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/75175418526.pdfIn PDF document text
    • http://www.serge-valentin.net/ckfinder/userfiles/files/nofakeboseriso.pdfIn PDF document text
    • http://pluimveebeurs.com/userfiles/file/silesaxokame.pdfIn PDF document text
    • http://monarchiaerembolt.hu/tmp/xaradijiza.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/e0b514702c9a1a885cccc818d564fbb9/65388742938.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/kamalojezaxu.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/8874538922.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/85483861732.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/83597074648.pdfIn PDF document text
    • http://silarperu.com/UserFiles/file/kobumeded.pdfIn PDF document text
    • https://endeligmandag.no/e-brev/data/div/66925357655.pdfIn PDF document text
    • http://pronobile.de/catalog/file/mopadiwawabitifogorage.pdfIn PDF document text
    • http://edallyshop.com/upload/files/debebiki.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/5f9d5bfb969bf2f3f39e68118d1ca11d/75752644372.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/lubijibekobemuli.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/75617117382.pdfIn PDF document text
    • http://www.sana-anong.com/ckeditor/ckfinder/userfiles2/files/7620460188.pdfIn PDF document text
    • https://asmitahrgroup.com/ckfinder/userfiles/files/raguxibujifiwi.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1cd1b6d36---kubafadupo.pdfIn PDF document text
    • http://labonscafe.com/userfiles/siriwivofexomegolisodu.pdfIn PDF document text
    • https://kaktutzhit.by/uploads/files/59079648832.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=best+file+manager+app+for+android+2021PDF 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_off0000b9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B2 11188 bytes
SHA-256: ddf226050b39ad5fa8236f8c68382aee1156cebe85475f1c80129f435848b24d
font_01_sfnt_off0000d3b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ebc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC9 16212 bytes
SHA-256: 33e010ff0190cc63ce2a41d8343810723c0ae01386165598ceacbd29d3e4de38

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