Malicious PDF — malware analysis report

Static analysis result for SHA-256 6296ab8ac2274bc5…

MALICIOUS

PDF

74.9 KB Created: 2021-09-23 20:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ffd654d1774490c4b5aa098b1d1d3954 SHA-1: 4af4dd65118b3c0ddab0d0691f3c064844c78a36 SHA-256: 6296ab8ac2274bc5fa2e27528dd807ac5a3b14e4969edf7437f641704298ff05
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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
  • 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://ateliergermain.org/sites/default/files/file/tufexobanenivopuraba.pdf In PDF document text
    • https://www.alugutader.fr/ckfinder/userfiles/files/dakokugaxubejavowogosenaj.pdfIn PDF document text
    • https://bizimpin.com/calisma2/files/uploads/80354287836.pdfIn PDF document text
    • http://ipai-bg.eu/img/file/wetukujakimukuxer.pdfIn PDF document text
    • http://topspeed4wd.com/ckfinder/userfiles/files/migulekom.pdfIn PDF document text
    • http://hadt.vn/upload/files/23796635641.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140ba10a4303---towosefedusowarolo.pdfIn PDF document text
    • https://willes-gb.com/uploads/files/202109122202014510.pdfIn PDF document text
    • http://czechdidgeridoo.com/admin/upload/file/86741264222.pdfIn PDF document text
    • http://rivebistro.net/ckfinder/userfiles/files/demakaxupelum.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/b51951f1279e3c2147839c72138b7471/bagida.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1980cade2---20096703653.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16146ea7f695ce---sukeko.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/r7jrt4ggrqislp376jfji8pcfo/watapifapaziba.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/kalasosoxizuzima.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613196111279b---47771964634.pdfIn PDF document text
    • https://ibliberia.com/ckfinder/userfiles/files/pijujigikonadurafut.pdfIn PDF document text
    • https://fundacjanadzieja.com/images/wyswig_images/file/91883108955.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/sijuzexapinewugoroxobudop.pdfIn PDF document text
    • http://ruresept.ru/files/file/rurovopesekuzewigaganoji.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/40895165317.pdfIn PDF document text
    • http://tnslib.su/userfiles/files/gaxozezamujusat.pdfIn PDF document text
    • http://domadoma.cz/userfiles/file/7585848745.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396f0fae6af---darabevuzavip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=movies+apk+download+for+androidPDF 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_off0000bfd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD4 17504 bytes
SHA-256: 8ec35ae53467c802566919e4f3b714bd3c79323085c1ea6cb81102b44e4a7624
font_01_sfnt_off0000ed1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1C 10628 bytes
SHA-256: c58bbc268f76b1435ab298cff192bf62e0a01b2471aa8bd0c29b91b499a88428
font_02_sfnt_off0001059d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1