Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f7fe330d48380d…

MALICIOUS

PDF

72.9 KB Created: 2021-09-05 05:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 02bc26289dee73b73957ca359fd7a32e SHA-1: f3f419f625d461185e20383fa120a7fea3b1fd9d SHA-256: 10f7fe330d48380d9bfac8995e5958eb9d07f8ac47ad58e9e0834bc3f542ae54
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to potentially compromised websites or disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are indicative of a spearphishing attachment, designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16074758ac358a---80745005835.pdf In PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/ee24e1dfceb7fdf171804861554d0b4a/12069022937.pdfIn PDF document text
    • https://elegune.net/files/galeria/files/4554550226.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/44435686959.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/31981245730.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/magir.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/sorusonavo.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/f140c9490eea9290cdb44e8957803435/pinewoxizemuvul.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/44480939083.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7f8be5450---jafetete.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/zaxuz.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c9bc9147e---98947765204.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1fc2e13c8---nilofuzevoporoledap.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/400e6c75814f1db0eba40e40fed7b8e3/wadisakujejob.pdfIn PDF document text
    • http://opuspoint.com/ckfinder/userfiles/files/68263069965.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/31917202215.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/79099446769.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/wozapimema.pdfIn PDF document text
    • https://rakowka.pl/userfiles/file/gavexaniwobes.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e105063c80---jajavodupivoluginava.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/2cd5dd622c61c675feb7b705f9a6a90d/jukapexoxumowamerefiful.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/40872219315.pdfIn PDF document text
    • https://greenways.at/userfiles/file/zajimakidagofawowamimew.pdfIn PDF document text
    • https://tisuputih.com/contents/files/29284928180.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=sydney+subway+map+pdfPDF 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_off0000bb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB9C 10716 bytes
SHA-256: 70da6b7fb1c20c48fc0834ed7ead5df7a477b6c3f10aef4f3a32deb5fdd85745
font_01_sfnt_off0000d410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD410 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC22 16252 bytes
SHA-256: 96bec937ba6bab261e73d23347597d3d62ed91ed13a00939c0af326f0831cd32

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