Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ba995368161294…

MALICIOUS

PDF

81.8 KB Created: 2021-09-09 20:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d2def111fc094c41a827d43194f3668e SHA-1: fa270f3caff3fe0cef882fc5a5ed0221354673f6 SHA-256: 49ba9953681612941c563ddc0b63e4cc8b13bf94bd85a5692f4bfde51609bc9d
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 0.9968

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://pixomot.ru/uplcv?utm_term=balanis+antenna+theory+pdf PDF link annotation
    • http://w-f-l.de/user_img/file/58441781100.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/85982508207.pdfIn PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/gibawimotewabipusaju.pdfIn PDF document text
    • https://ctcitsupport.com/media/files/wazup.pdfIn PDF document text
    • http://portableandcool.com/files/files/9130304180.pdfIn PDF document text
    • http://all-paca.com/ckeditor/ckfinder/core/connector/php/uploads/files/61081142003.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0573d36bc---12178246779.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/4c9e27bff12cf3731826eb4cfa6a02ff/zibegamejebaxipas.pdfIn PDF document text
    • https://buyafranchise.org/files/files/37676236860.pdfIn PDF document text
    • https://currenwatch.myhost360.cn/file/upload/files/09-02-01-17-32-62.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/pesiligame.pdfIn PDF document text
    • http://www.bash.cl/media/file/12057985411.pdfIn PDF document text
    • http://theloanwala.com/userfiles/file/kebej.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/fupizifedafi.pdfIn PDF document text
    • http://oodow.cn/upload/file/210904062105705929ep9rxcbb6kbk.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/dikexufuxafazebidazol.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/tajedasusugekudenonolapit.pdfIn PDF document text
    • https://newsru.md/upload/userfiles/files/45396580346.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/niruz.pdfIn PDF document text
    • http://xn----ftbkdcamitb5h.xn--p1acf/files/fck/file/68901026596.pdfIn PDF document text
    • http://www.pilatesyoga.hr/files/files/45357569829.pdfIn PDF document text
    • https://deltarents.com/upload/ckfinder/files/xizuto.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_off0000dc61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC61 10760 bytes
SHA-256: 29f2915f040d559df4987ab489c7d4c75ac62da6d8e12e4640eb44cfb1855e0f
font_01_sfnt_off0000f519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF519 17080 bytes
SHA-256: e9758e0531ca79c393ef8984b2fec9b259315a3299342068977c41fdaabdd1f2
font_02_sfnt_off000121b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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