Malicious PDF — malware analysis report

Static analysis result for SHA-256 94c2d5d908b14b4d…

MALICIOUS

PDF

73.1 KB Created: 2021-08-28 15:53:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d6accf0a4e41f461a4269e0b4843a02d SHA-1: a877e19cb7252ed714bddfba21202f284bec3128 SHA-256: 94c2d5d908b14b4dbe3e5eae25e0c008ce62c1afe76d788e0a87ad8b233ffc1f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://synerhu.ru/uplcv?utm_term=computer+science+engineering+interview+questions+and+answers+pdf PDF link annotation
    • http://urbanconstructions.org/images/uploadedimages/file/50315252240.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/degebotixirokabolefuve.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/dc4b08e903e72715d3092de76c2e36ff/53769821437.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720c08176c2---60483115677.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/51212877770.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/wesezapulujirosa.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16104afea741b7---vesezuzewopizu.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/xozoruxiwamuzerekef.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cfa971a4143---zivimuwewutuseziga.pdfIn PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/patad.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a35824dfd5---garoj.pdfIn PDF document text
    • http://architettogherardi.eu/userfiles/files/22720133933.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/2b3538270dd464742ee1c50b02d42747/83280390153.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d06475ab251---77335167085.pdfIn PDF document text
    • https://europacreativaeuskadi.eu/files/galeria/files/53044051888.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/nonizifori.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/dhqfjgts9u4jnchouiu86a5jd7/92218074924.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/53daf531946ec24300cc5a4e00b03b5a/mirixi.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2af2b45959---tozalipebupov.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/47966722983.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/d4606bd3d6b61604382004a205970885/48011117743.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/tibifuxevome.pdfIn PDF document text
    • http://zhuoer.ltd/userfiles/file/42879021758.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC19 15676 bytes
SHA-256: 5df2c1095dd852720e041bf68a1d5cd05580e6cfc0de0383af44da25a3b21d77
font_01_sfnt_off0000e3e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF7 11344 bytes
SHA-256: c9e7789752527ed18fae366a7701bc64cdf2bd88255cf7ccc18c96b347e4c877

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