Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f0da2e061032464…

MALICIOUS

PDF

89.6 KB Created: 2021-09-04 14:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cc0584823ce477d92f97712834697e3c SHA-1: c7337890acbb91be6a7d8e6dc84f065d357c9eda SHA-256: 8f0da2e06103246487dcf29846144d8db47bc3006e6b62447fd54f5e5a54d4ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://pistant.ru/uplcv?utm_term=franschhoek+wine+route+map+pdf PDF link annotation
    • http://fygl.net/uploads/file/111716561667.pdfIn PDF document text
    • http://uelzecht.lu/userfiles/files/xugidavajexew.pdfIn PDF document text
    • http://sghr.ca/upload/ckfinder/files/65980624449.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/ad38b8b641cb99dff6d99974d719688c/54866259778.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/22871617127.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/lezowiti.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/mepozitaxasikirukujun.pdfIn PDF document text
    • http://poetische-malerei.de/web/editor/files/wemukigalarukibeve.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/dodezuzemoxofofafute.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3cc81f332---74369180772.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962fb4a09c9---tapefog.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/a5437520c1572d2e237d7c075d6b0642/kamile.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072041fcf4b0---9299505496.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/kokifu.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/7877047ad7a962de2f52a53c87eb3703/sononodujulowetedu.pdfIn PDF document text
    • http://www.fishandcosolicitors.com/uploads/files/72733074677.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117476689715---pixumejokenusarasekav.pdfIn PDF document text
    • https://zzwgjx.com/d/files/96578902826.pdfIn PDF document text
    • http://arenabilardo.com/data/_files/tozufot.pdfIn PDF document text
    • http://kap-group.com/ckfinder/userfiles/files/25053969265.pdfIn PDF document text
    • http://campingwithconvenience.com/files/files/72444714209.pdfIn PDF document text
    • http://integrotech.eu/zdjecia/file/pufojetu.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/7b6a536825f135ed98cac8e223b8135d/46560184464.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2d210e7a9---64930159029.pdfIn PDF document text
    • 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_off0000f7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FED 18300 bytes
SHA-256: ca51ffbab12c1cb0bf3c41b3b6f6048f0bf230477db7a53ce9b7f295081b66cf
font_02_sfnt_off00013f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F97 11096 bytes
SHA-256: d61aea033c1313ec62d834617c6b20923e397832af3dd75d239722691f025638

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