Malicious PDF — malware analysis report

Static analysis result for SHA-256 6785fffe69837c8d…

MALICIOUS

PDF

84.7 KB Created: 2021-08-20 01:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2c2a16fde152e69d17e2f8b27a6d67ec SHA-1: bc387bac88ccf5e60fc6910853d89fd9eeaf7e5c SHA-256: 6785fffe69837c8de5bc78145642699961e326f3307ff6994b45d076d9d4a85e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised websites and link farms, suggesting an attempt to redirect users to malicious content, possibly disguised as a free download for an analyst notebook crack. No scripts were extracted, but the overall structure and URL patterns indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aecfcfbaf8b---sufimedumetogates.pdf In PDF document text
    • https://blogsma.com/files/90692553404.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/b8235aaac91338c63483f00f5b522cd5/37613982776.pdfIn PDF document text
    • http://dongsimkindergarten.com/upload/files/pamijiripo.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/4546553390.pdfIn PDF document text
    • http://griswoldremgmt.com/uploads/files/newopijozabinodulafefe.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/e24b715279c89426f986cadad35b82df/10167508154.pdfIn PDF document text
    • http://portableandcool.com/files/files/nanonabowovisawilusu.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/20183006028.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/33588644695.pdfIn PDF document text
    • http://greenplanetnepal.com/userfiles/file/69650311673.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/45522cd7b7a4736289ab4ecb075f1338/guvegumebasexitowujo.pdfIn PDF document text
    • http://orlickachata.cz/files/files/vemutigozadaxil.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160750ca9d6480---73597904869.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c22d67f07d1---motif.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/dovenujogilesi.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/kokapesuzinige.pdfIn PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/wafeza.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/wekebedopukuroxigosovefen.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/6ed13360bd4fb75dfbb453eafa3ba708/99890799166.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=free+download+i2+analyst+notebook+9+crackPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80C 11060 bytes
SHA-256: 961342814d8cdd6f10e2fda781f3c61b4d00db3136f735b7b5a8f8adebd4e871
font_01_sfnt_off0000f213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF213 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A20 3620 bytes
SHA-256: 71515fb6a959eb6fa0c1b4bf1cef6a87a366058ce6aa2594959f7f6531f962bb
font_03_sfnt_off00011843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11843 17052 bytes
SHA-256: 7181b29578e2c9c86eb983e8367f22e6759c20d3feae4a2fb77275330d9d0b61

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