Malicious PDF — malware analysis report

Static analysis result for SHA-256 60685cb4042dff63…

MALICIOUS

PDF

80.9 KB Created: 2021-07-05 14:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ffeb7a0bc6570664df414c5e09ad1653 SHA-1: f3e3f098e28baeb8867bf94e13c454c9ae87089f SHA-256: 60685cb4042dff63042bcb496e786e00a1c13a8e43a14e7a32bac3e98d964933
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, utilizing compromised CMS uploads and disposable hosting to obscure its true purpose. The embedded URLs, such as http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160833c8f22ce2---xaxutele.pdf, likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084783a6dfe8---vevejizumuzadodenuxetonis.pdf
    • https://autoparkalbanese.it/file/20667887187.pdf
    • http://popnmusic.fr/userfiles/file/xaravegugokip.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/7806d26d0ff0a638f81bc39f289f44ef/93853856148.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6a2e3ccfb---fasazatejudexile.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/38dbc31c25a4710dafffcc7e41242b48/kolupa.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ae34a2a9756---puluzafi.pdf
    • https://hosvagyok.hu/userfiles/file/87393696994.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/b5adf1c767c81d313adb78f5c8690b30/jarimuwonutanuziguf.pdf
    • http://yfatc.com/userfiles/file/45888188945.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160833c8f22ce2---xaxutele.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160728d88b7eb9---tagogelizum.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/7da72b6916141b573cb8457a2660d44d/55397189216.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/qvs3q080c0r50g5rg8mt6gbvja/62169096630.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160bef37a51b26---pozenuvowa.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4c069d99d---pogebidagiv.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160acec76858f7---jikofagux.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9657b4cc93---61693769863.pdf
    • http://faurerom.com/userfiles/file/bimov.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c37b1bb4d43---291673620.pdf
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/36069531784.pdf
    • http://trans-serwis.com/userfiles/file/55485076700.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/eimr6t0o1o2prk2pk63p8uhp1a/xawiradifudavidafag.pdf
    • http://windmill-bv.com/userfiles/files/75113693397.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=download+pdf+to+word+converter
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9cb.bin
21e7e54d1fa6e28795e60bc0ec41587c37f07a722d3516bc2ec49a865019dece
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CB 16988 bytes
font_01_sfnt_off00010616.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10616 16792 bytes
font_02_sfnt_off00011e2d.bin
f4d5ef2554d87dcb0cdc9bf83f77c5c0c2f9ee0b8b769db554bedeb18a5b7b73
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2D 10508 bytes