Malicious PDF — malware analysis report

Static analysis result for SHA-256 6635fdaf16946612…

MALICIOUS

PDF

62.3 KB Created: 2021-09-24 11:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5754cb61210556e2a7d9fe90128cb799 SHA-1: 46511514fd3ad0e71433a9b129ff4375c57ce050 SHA-256: 6635fdaf1694661267419bbfb3463f9a58105c2d388105fbcbed106f14800c02
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links hosted on disposable domains, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7557

Heuristics 4

  • 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
  • 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://haraj-alqunfudhah.com/userfiles/file/30569549376.pdf In PDF document text
    • http://napiarsaigh.com/images/1873914294.pdfIn PDF document text
    • http://partnercable.com/files/62633637927.pdfIn PDF document text
    • http://mvdeastudio.it/userfiles/files/20986938904.pdfIn PDF document text
    • https://pr-dienst.ch/file/15712208394.pdfIn PDF document text
    • http://aaas.handyfriendship.com/upload/files/3776649997.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/74320598115.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/paxojoxejijaporumiriwo.pdfIn PDF document text
    • http://motovelo-nmsk.ru/userfiles/file/venafunetarinaredenes.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/46106141019.pdfIn PDF document text
    • https://chennothinterios.com/uploads/file/katusemalafa.pdfIn PDF document text
    • http://laarakkers.com/ckfinder/userfiles/files/80141394040.pdfIn PDF document text
    • http://www.dawnrotaryclub.tw/UserFiles/files/figoper.pdfIn PDF document text
    • http://ctm.it/userfiles/file/44301056999.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614d353066cfa---28340514129.pdfIn PDF document text
    • http://eatoceanic.iorderfoods.com/uploads/files/64567768139.pdfIn PDF document text
    • http://1-cities.com/blog_images/blog_/file/44036502357.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/wagevodosemunage.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/mowupotinopudativo.pdfIn PDF document text
    • https://alsharqcc.com/userfiles/files/24437204156.pdfIn PDF document text
    • https://greassi.com/editor_upload/file/19735963867.pdfIn PDF document text
    • http://ykzn8.com/upfiles/editor/files/15824393442.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=bad+ice+cream+3+apkPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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