Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b8bfc035b7cc5de…

MALICIOUS

PDF

70.6 KB Created: 2021-05-26 02:36:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f452aaed722f0ec6e42048ea29e5927f SHA-1: 516ca5dee29c5dc4e2cffa754bfb35fefe437a18 SHA-256: 0b8bfc035b7cc5de55320dd1d1980ce8898e00e0f618265c8c7aa7206bde5379
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS upload directories, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and URL analysis point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca04d66ce1---widufulemuv.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/69063f206a5ece2cddb464c84468db0a/16494283433.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/0d49a23fced167c8ece80ad8aa810333/lafoxugonuragiziwesam.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/5378424158ee5de6cc1913d8900ee245/juvumogenikob.pdf
    • http://ukrainski-rosyjski.pl/userfiles/file/bugelozedo.pdf
    • http://al-bandak.com/userfiles/file/wavubalezobuponasanezaf.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/top8i3am4d5k01ej94vke7j5u7/tesumevibomolu.pdf
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/o0oe6f0v02mn7dv33k507tu5q7/gukodugasupokixuw.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748c6b9faf3---780050377.pdf
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/c9101b2c0920de038facde869100c4ec/19247317046.pdf
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080969ec8cf1---78133697127.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e727e35038---31350049856.pdf
    • http://ibb-online.ru/f/file/46101586999.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/o65vpumf7e6gcph34e3db2co81/76946730055.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5d0485fef---wimetunavarutanupoma.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c1eae37c1e4dce668a01c8fc00f3b319/tubuxoxopoxuxa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=csd+hire+purchase+list+2021
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4f1.bin
33447df7464b19957cb4a1699889ca69fea8d4cfe246070aa4d70704d7990cd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F1 5392 bytes
font_01_sfnt_off0000e737.bin
ddd8e12a8efe46bdf3e128817f1f78ca4a40c8c2c7c03c66ee7be1e35507f6b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE737 10868 bytes

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