Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdbba39a21e37e9f…

MALICIOUS

PDF

85.9 KB Created: 2021-06-29 17:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9aa935a4f62c90c709abc566bb1375d9 SHA-1: 53af9eeb6b251a5150a1e62d45cb2dafb47c19d5 SHA-256: fdbba39a21e37e9f9a47ea6ec8fcaf693f0128b062a67957ffdef44772fbd1e3
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to compromised websites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. While no scripts were directly extracted, the presence of external URI links and the overall structure suggest an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3632

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://pistant.ru/uplcv?utm_term=promethazine+hydrochloride+and+codeine+phosphate+syrup PDF link annotation
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c90795b2d6---kokiligogazedurisi.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c057b08cc7a---65692763397.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/gotibupezikowumukenuj.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b440beda3dc---53739193993.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5feb1ef019---98575360754.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1dd697bfb5---33652857388.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a182ae0d12d---67041091159.pdfIn PDF document text
    • http://poolprotektor.com/userfiles/file/simebomidovuxuravut.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/buduf.pdfIn PDF document text
    • http://ongnuocdenhat.com/upload/files/73644469739.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/6lo0heo3cmu6mo5l5cj9gbjr9v/manedawuzepem.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/92dada15258cde154ff0877bfa4739bf/xumuwumebibebabubefi.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609f114518629---lelukenipawaju.pdfIn PDF document text
    • https://stayatrosetta.com/wp-content/plugins/super-forms/uploads/php/files/j40qdjklbstimkeu4pd41vopgl/limixikuvedowe.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/bujuliwekonukixexonijidim.pdfIn PDF document text
    • https://bem-sa.com/img/file/vejif.pdfIn PDF document text
    • http://adhdesign.de/userContent/files/20210621132900-94651253572.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/jovewosupikutorot.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/266c99666b07c16fea8bab6e452ec83d/fetaxoliwulimawurame.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/cbcec9bb8e21c5b1ec41868bc01e7e93/gibuluz.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/d6d5cc9cdf96cec9e93f228a1e98341c/wipevajokiwuruwig.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd3fe223ab---59490191978.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be62c9c813---38299589419.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/pulatituwemexefexeberefu.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/e8cbf5345e1e5a47248c984c3e206812/35223447345.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD6 11056 bytes
SHA-256: 4ed2284d3a14bea1b6d90b296c421511dd334b1352877aaede14a035d4023663