Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f33a09686f25ca2…

MALICIOUS

PDF

70.3 KB Created: 2021-09-12 11:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6d6005a1af01729273d248cba6e8f5cc SHA-1: fd8561c42dd7a94f49e8d042b5c3e187792009cf SHA-256: 0f33a09686f25ca239914e8a15b424179d1767948e991e79126a99e916f78cac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, suggesting a phishing or malware distribution attempt. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135d4cc522b9---53560126199.pdf In PDF document text
    • http://coming-c.com/userfiles/file/82573288711.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/gifivonusorevisino.pdfIn PDF document text
    • http://savytrading.com/userfiles/file/14676221262.pdfIn PDF document text
    • https://espritgt.com/userfiles/file/rudakogomodizamafuwojug.pdfIn PDF document text
    • http://energcomb.net/cms_enercomb/sgi_userfiles/userfiles/files/75767616906.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/nedawaxitifivevebamodep.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/busufib.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/2463792411.pdfIn PDF document text
    • http://geometramaurotozzi.it/userfiles/files/zedaz.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/pifipurojudazid.pdfIn PDF document text
    • http://adria-ex.com/images/blog/file/gituvuwu.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/32813789486.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/61203217428.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/c266e0c69b8cf700b0e9bd11e52d0b5f/39181978170.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/bojarajipenirod.pdfIn PDF document text
    • http://burmeseburmilla-allevamento.com/userfiles/files/sojafega.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.net/filespath/files/20210906042148.pdfIn PDF document text
    • http://rentappli.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/diwesipinexifidogoxedo.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613cfe1e88151---sufafut.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/56076085805.pdfIn PDF document text
    • http://nhasachnguyenvancu.com/Images_upload/files/2022305373.pdfIn PDF document text
    • http://mueblesdepladur.es/1/userfiles/file/zorawuwi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=marvel+academy+mod+apkPDF link annotation
    • https://lapdonline.org/file/81300541162.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_off0000b562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB562 15048 bytes
SHA-256: 2cf6675ca94093c88582bb372456896cc0c200ceda1ba672de4b2d4e31c9e7a8
font_01_sfnt_off0000db8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A6 10476 bytes
SHA-256: 8e6252a5a2ef69013aa5cd44b92cba1a3b9a280fab0d5af496b3db0ed542d2a3

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