Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f95ea27b58e1f4d…

MALICIOUS

PDF

80.3 KB Created: 2021-06-28 15:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 313840909d76c31600aeb6d1ace8614c SHA-1: f2016c878081910b25f6c77488b2b2733133f055 SHA-256: 0f95ea27b58e1f4da874feba04a86125c4c841e68c59342204121e5ea3bd7dfd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to lure victims, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://cructi.ru/uplcv?utm_term=mystic+messenger+outgoing+calls
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074cbf1537da---24105817818.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160835dae6a455---72466400061.pdf
    • http://ixtvs.de/_upload_bilder/_filemanager/file/74731778520.pdf
    • https://quaint-house.com/zadila.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ba831f440c4---45787528097.pdf
    • http://camwater.org/media/files/talisejumimawag.pdf
    • http://pogotowienaukowe.com/Upload/file/jusopizaduji.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/f94a2233c6e949de6408784fd54dec23/10690769284.pdf
    • https://alnahamgroup.com/userfiles/file/87236773898.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080687fd623f---fojenitariru.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f2db8c8f9---muvule.pdf
    • http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f61fe4c8e1---39670346658.pdf
    • https://planet-for-events.de/userfiles/file/xiwewajot.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/59b3a3ec35f02733741faf977b1484cd/pidirazupu.pdf
    • http://fujavietnam.com/images/Download/91617182058.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/2953a7f677023e496ff9f56ce1812757/nefol.pdf
    • http://chataphan.com/file_media/file_image/file/sunawozok.pdf
    • http://akcjonariusz.com/UserFiles/file/99451234570.pdf
    • http://mahnomenalumni.com/clients/879209/File/55887489566.pdf
    • https://cncunse.com/d/files/46805236673.pdf
    • https://baxsporthorses.com/userfiles/file/wakezalewimaranitadalada.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/5fc7f388eaf3bb0ee35551dabada7e2d/rutefawini.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0cd.bin
27fa49ca30b1f57c6e4f8b99ad1f73ead7010ce1f191e20d716503af09158f46
pdf-font-stream PDF embedded font (sfnt) at offset 0xC0CD 16160 bytes
font_01_sfnt_off0000d642.bin
b4fa4a84236b510746494a158b33f1636b88f601ac7634f06cfdf7d7d6f4e625
pdf-font-stream PDF embedded font (sfnt) at offset 0xD642 16984 bytes
font_02_sfnt_off000102aa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x102AA 16792 bytes
font_03_sfnt_off00011ac1.bin
ff5f6d3e8ad53935ecfca42392ccb25902999490c04a7b242e179d66445af374
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC1 10780 bytes