Malicious PDF — malware analysis report

Static analysis result for SHA-256 8146514d0fe4387e…

MALICIOUS

PDF

92.0 KB Created: 2021-08-03 00:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6da69c77f1b3ff80fe7e585e3c442057 SHA-1: e345da0da4f211d0d45f4c38d50b772837d1b6e7 SHA-256: 8146514d0fe4387ec1245b5aeaa0f382d070766643536f0193184e0ba4e6bc21
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it's a link farm and points to compromised CMS uploads, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious redirection campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://cukiernia.eu/upload/files/fapesonu.pdf In PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ab2d44e5a---xozevijizasowixorimuti.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/97654958383.pdfIn PDF document text
    • http://hotechike.com/files/files/nexepabefo.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/8b86dea35c8f338911ad5e9355ba674a/jokurip.pdfIn PDF document text
    • http://op-gold.com/ck_image//files/5121216838.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/24878480973.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/worugabiwifuru.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/35534823784.pdfIn PDF document text
    • https://www.winsum.frl/ckfinder/userfiles/files/26526977592.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/7c618d9f4e902cdb967d3cea3b887537/lazotusisumevovoxib.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/fab21fff1f70dfe794bae84fe95b5792/fapipezazuditeligosabaroj.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcbdff75226---domarepovabibatipibamed.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609878a499ce4---vofopajoxago.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794a3bb78fb---wamogukerujadipobo.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d3f0845f9---wodejuno.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609e10a9b35ba---papikijosid.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/64350226817.pdfIn PDF document text
    • http://oilandgaswork.com/userfiles/file/nivexeninafob.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/1590b91003aa01de31d041522403807c/3827734137.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba6df54241---nodirijajoku.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/56ee1d3935b43bd25d00128f2975a533/17952287578.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-6-18/20210618170248831775.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=les+dieux+sont+encore+tomb%C3%A9s+sur+la+t%C3%AAte+streaming+vfPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3F 19444 bytes
SHA-256: 4b0f96895104fd3f56400e63f50e2088370799390fb7ce6dbdde1056319e8d1c
font_01_sfnt_off00012bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF0 11496 bytes
SHA-256: 58d675b357ada78f10c52b999be12ddb8697220ffde6da56dae0a27e02210349
font_02_sfnt_off0001465f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1465F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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