Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebb265979eecc3cd…

MALICIOUS

PDF

84.6 KB Created: 2021-09-18 10:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 7c7c716dc034f99af29a897321b997ae SHA-1: 2cbbb4d43c138d7b611493b8a18a6ed85706aad2 SHA-256: ebb265979eecc3cda4f8ac90507570539fcd8e6f7fa508dd05b72596ffe283a7
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs, many pointing to potentially disposable domains, suggesting a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates this behavior. While no scripts were extracted, the presence of numerous external links strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/b9494664aaa2b26849e07b5d27de3bd1/fidawujesikigojedo.pdf In PDF document text
    • http://lj-group.cn/upload/files/76870190394.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/97998795705.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/lifeginimed.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/18581332964.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021091810224673499.pdfIn PDF document text
    • http://sladkiy-ostrov.ru/userfiles/files/wofobozavuguludalotinodip.pdfIn PDF document text
    • https://tepihtrava.rs/files/18420284910.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021090607004373499.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/tivupufumimikewonirubad.pdfIn PDF document text
    • http://chengzechem.com/upload/files/wudozad.pdfIn PDF document text
    • http://xn--brneneskontor-landsforening-b0c.dk/userfiles/file/26320982320.pdfIn PDF document text
    • http://jjsgreatescape.com/uploaded_files/userfiles/files/5671070186.pdfIn PDF document text
    • https://vinamex.info/uploads/news_file/45682311306.pdfIn PDF document text
    • https://abzesolar.com/uploads/files/6894875923.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/15568642770.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/57208140665.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/232c43bbee77f388d20a15536b6f9c0b/20484801111.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/74602781284.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/46891392680.pdfIn PDF document text
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/77727158911.pdfIn PDF document text
    • https://masukpt1.com/contents/files/41423229808.pdfIn PDF document text
    • http://altadirezione-consulting.it/userfiles/files/vetebuxeginenadetap.pdfIn PDF document text
    • http://ultrabeauty-ff.ru/userfiles/file/82321834758.pdfIn PDF document text
    • http://aurora-c.jp/files/files/guwonaguwezipobaralezak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=myket+android+4PDF 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_off0000e8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DB 10304 bytes
SHA-256: b81b98238dd870f05d131280af81d67e451e11d661e8e7d436f2da9f62e239f7
font_02_sfnt_off00011836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11836 17296 bytes
SHA-256: ee8ff5920ba0b39d4de7e6e6fc7fd78c12c08b841420988a3ca762d89bc6c207