Malicious PDF — malware analysis report

Static analysis result for SHA-256 f030c9a648e56805…

MALICIOUS

PDF

84.7 KB Created: 2021-09-01 20:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f45912f07553e2d3f531aa97ea301b3e SHA-1: 7207603d1cdf8cf0af2983e1a63e6546b6a88103 SHA-256: f030c9a648e56805548dca4cd78d60c013397c0b880123f8ad9ca67c2c2233b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, many of which point to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is unreadable, but the link farm structure suggests a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://clair-environnement.eu/catalogue_dynamique/file/modetozuz.pdf In PDF document text
    • https://rajatotogroup1.com/contents/files/duzabuwaxovomir.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/xufisezuzuwonotu.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/qja4p1a5jpete6dat2ir6bkh1r/29199613204.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078b82c639c8---25106975929.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16097297f4b093---sajajobepelelanarig.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/8b6eb1550f0bdce5982801255a1558eb/53730377329.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/1989907184.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/87134877848.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/j8okdnnl9gnifshj93s2m528n0/muvem.pdfIn PDF document text
    • http://emannsltd.com/userfiles/dupoweletivixemumebab.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/rirefewumaxetagat.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/4073521466.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/95233014659.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/titupiwanopox.pdfIn PDF document text
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/31896344732.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e1b29d477---sovolum.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/57320278780.pdfIn PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/8668004958.pdfIn PDF document text
    • http://qkmedica.com/uploads/userfiles/file/79604159686.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607221f55cb86---kudelivemiwawogoxujipaba.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/91935159930.pdfIn PDF document text
    • http://theloanwala.com/userfiles/file/xasazebobafopasefe.pdfIn PDF document text
    • https://tl-systems.hu/files/files/76274086456.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/e01bb4951654a68ffdd200b3a50e272a/1880012535.pdfIn PDF document text
    • http://suliaox.com/v15/Upload/file/20217201130348090.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=bell+hooks+capitalist+patriarchyPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e39c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39C 10628 bytes
SHA-256: d5bdce9a5dc494869fe98f732de32623207133f0a0369c3dad7807c0fcd3b384
font_01_sfnt_off0000fc2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2A 18592 bytes
SHA-256: e448d9321d121e10a3d81eccaebb1914f29074d40a98a52e9bf299ce8b2f1625
font_02_sfnt_off00012be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1