Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0d36a77dcb639d…

MALICIOUS

PDF

80.7 KB Created: 2021-09-18 22:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9df21ecc41477b88983a170bf53b574c SHA-1: d50cbbeaa3d3df6648c4fac6332f452e694bcfe1 SHA-256: fa0d36a77dcb639df02a00d447b419f5c9bf339207a1576293c3ea3c80075165
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lure users to potentially malicious destinations. 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 0.9917

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://minerva-collection.net/files/files/63969084336.pdf In PDF document text
    • http://grafiport.com/userfiles/file/wotop.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134535483ab2---rudoli.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161330ee4c50ee---wugaligofupusegivewe.pdfIn PDF document text
    • http://yjbiotech.cn/upload/files/72142031010.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/tulorokubutuginofuj.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image/files/mowedifaludonireregil.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/98751846387.pdfIn PDF document text
    • http://lnimeina.it/userfiles/files/32978141392.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/70310309559.pdfIn PDF document text
    • http://instalater-macecek.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/nalatokedu.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/84972093499.pdfIn PDF document text
    • https://dukupahit.com/contents/files/fumow.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/jozipumez.pdfIn PDF document text
    • http://cheniou.handysociality.com/upload/files/zaziveliwofinek.pdfIn PDF document text
    • https://maria-galland.ru/files/file/ponivanaso.pdfIn PDF document text
    • http://orthopaede4you.de/userfiles/file/farigidotoro.pdfIn PDF document text
    • http://adidravidar.com/ckfinder/userfiles/files/jinebimiwigen.pdfIn PDF document text
    • http://resheto.ru/users_images/fck/file/wejoju.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/79089883379.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613887ded4110---mofavebirolobabipo.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/lanogakavorezewiza.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/161446b5778b97---xedemesekudo.pdfIn PDF document text
    • http://www.bc-arman.kz/ckfinder/userfiles/files/22226620010.pdfIn PDF document text
    • https://invest.pl/userfiles/file/71058494370.pdfIn PDF document text
    • http://starfishdowney.com/uploads/files/xobexivuxatotixiden.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=xender+updated+versionPDF 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_off0000d51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51B 10512 bytes
SHA-256: 9e77dee152ef9fa96d1449adfb32bc17a01fd6901faf77d872ec3f80eec5a6dc
font_01_sfnt_off0000ed28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED28 17788 bytes
SHA-256: 9438344cbf9b3373f435f2644511222912d4e213182dcacc4a8003cab8ee579c
font_02_sfnt_off00011ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.