Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba860770fcd21b69…

MALICIOUS

PDF

74.8 KB Created: 2021-09-01 02:46:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: fbd2e9405ca2c5fcdac2d2bf9fe14c1f SHA-1: afffe116f626604093b178b81d3bd0b24aa27fb8 SHA-256: ba860770fcd21b699b746f809ce9f789586e848348f147b4dab1489d30b7ea76
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3852

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://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/9i5iqbg11dn479kc2bioq24ltu/debedekogabumumobijututu.pdf In PDF document text
    • https://auto-rujo.com/images-editor/file/jadad.pdfIn PDF document text
    • http://recko.ru/ckfinder/userfiles/files/jijogew.pdfIn PDF document text
    • http://coffee33.ru/archive/file/90433724350.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/279ea408f2ba16d162ed267b4bcdcfba/47461759360.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608507e9b02f7---16114548144.pdfIn PDF document text
    • https://tramhuonghanoi.vn/upload/files/27620845355.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa591694785---jaroxotejofuxanixonutixu.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/xikukono.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/21044160639.pdfIn PDF document text
    • https://bfull.ru/uploads/files/manimibewozibonoxap.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/risalio3tiaskjqf81oeqjseik/80886617082.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f4cae68ce---73289779570.pdfIn PDF document text
    • http://brooklinehs1964.com/clients/6/6a/6a3559cec3eb17f551da2d864c8c85ab/File/46295741661.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16071bdcee9b6b---63692039543.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/ginitukufi.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/417256020864eb9847de53a695c0a276/87612384053.pdfIn PDF document text
    • http://uticachemical.com/files/upload/files/konaz.pdfIn PDF document text
    • http://heizler.hu/files/file/budefude.pdfIn PDF document text
    • https://equalland.com/uploads/File/foramu.pdfIn PDF document text
    • https://crossfitbeeshark.ro/app/webroot/files/userfiles/files/kejegobalawepogovipet.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/2c57112521b64c977c9ed99cd07b05a0/ruwalopilixelasuragi.pdfIn PDF document text
    • https://fetogram.com/images/upload/files/zuzekaxanebajofajefozaji.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/rirekafupu.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/26257358596.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=pandemic+burnout+is+rampant+in+academiaPDF link annotation
    • 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_off0000df33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF33 18732 bytes
SHA-256: 3dee9f50f17d59e4e9cc721ebc06035eebacda16056bba4fd969c225e51933de
font_01_sfnt_off00010eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDA 10868 bytes
SHA-256: 2ed4ae730871f6cf719e19db919fabd6159186bd3a5fb8beb7eefcf8ddf6217c