Malicious PDF — malware analysis report

Static analysis result for SHA-256 1033060285e34267…

MALICIOUS

PDF

77.3 KB Created: 2021-05-17 06:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1494c80c8aa59497a59cdba1fcdca12 SHA-1: 221880c9d5aeb01e6695066cfdd838bf66955af4 SHA-256: 1033060285e34267ff38f47ef07fb1bd7d4dc5c03ce60bfc3714ea46d1726d51
126 Risk Score

Malware Insights

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

The PDF contains multiple links to external resources, including one that appears to be a lure for a game download. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded URLs and the compromised CMS upload links suggest the document is part of a campaign to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://oniceh.ru/uplcv?utm_term=call+of+duty+free++obb
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/rtalmkljvklbhmshuokga02gu4/jivigazixaximibasawimolam.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16087c642bb5bb---dinaxozozupilomorimakonid.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16095c87507947---29501496816.pdf
    • http://afghansolar.com/userfiles/file/28614837783.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609f170cc26a1---98224031430.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090d851ce836---59913715347.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/uu7c95hsn0dian33hvcrdcj3lp/69559672343.pdf
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/gp8f0kc8kusiqelg6um24bisqd/20883994391.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160883250ee73a---13199883750.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/59b994c543c074b42ad6a2cc09701be0/66962621851.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086aac277a09---19041919227.pdf
    • http://dentherapia.hu/files/file/84167077362.pdf
    • http://zabradli-znerezu.cz/userfiles/file/22359851384.pdf
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/tvfj9kekmeqrq84e1c37pjjnot/pavutejusufonanatasimawef.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16088edb2bb099---jamaduvodebojovov.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/94f0f73dbc20343d68b683e167054148/vubetedawagaxugunojut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000f002.bin
da66c1e1f46af9b4d848f9df2405831364ac86bfbbab7b823fecc7d0785ec4e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF002 4872 bytes
font_01_sfnt_off000100a8.bin
8c94912e029720dff75e8778bf32398f47bed75310a87b87cb5ffbcf0832c424		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100A8 11532 bytes

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