Malicious PDF — malware analysis report

Static analysis result for SHA-256 f60811b1402b10c3…

MALICIOUS

PDF

80.2 KB Created: 2021-10-26 18:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: d2315b57bf52e5d7ec74353bc0bc576c SHA-1: 5ecf1b4e82e45f5de09c805b1d9c25bcf99f11d0 SHA-256: f60811b1402b10c3a7705804fd83fc35f4524e57b12e4ba34f3ea5aa28fe8bf5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links pointing to compromised CMS upload storage and disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.casestilistas.es/ckfinder/userfiles/files/kelaxekeponumadusebu.pdf In PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615b705e61356---nokibap.pdfIn PDF document text
    • http://bluebossa.pl/files/file/21310387696.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109301948078820.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16155f10a66e63---vamadafodigimozafu.pdfIn PDF document text
    • http://mirsistem.com/depo/sayfaresim/file/safidimanosorilovutamamu.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/vexudegolatikenejo.pdfIn PDF document text
    • https://ocw.tw/uploads/files/mifajidobizofelixit.pdfIn PDF document text
    • http://musicpark-live.com/userfiles/file/niwegezopuw.pdfIn PDF document text
    • https://semangkabiji.com/contents/files/27212551996.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613a3590a83d2---40952221572.pdfIn PDF document text
    • https://serviceelectric.ca/userfiles/file/71242301241.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/74145941402.pdfIn PDF document text
    • http://orzo.cz/uploaded/files/29664369020.pdfIn PDF document text
    • https://strategieb2b.ca/userfiles/file/79888348338.pdfIn PDF document text
    • https://nepaltrekkinginhimalaya.com/assets/userfiles/files/nowopelopapewuxixeg.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/95519247732.pdfIn PDF document text
    • http://www.angels-rest.es/ckfinder/userfiles/files/porobijekadajepuduniji.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/nobusugi.pdfIn PDF document text
    • http://mrukseo.pl/userfiles/file/32851752082.pdfIn PDF document text
    • http://piemonteforyou.it/userfiles/file/29010654118.pdfIn PDF document text
    • http://edu-soft.ru/site/htmlimages/file/22843417445.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/3910658578.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/23D8k0Ec_6w/uplcv?utm_term=cyber+beans+computer+applications+class+10+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD301 17432 bytes
SHA-256: b2360dadf2425db7bf93e96447d63e6de8994c1a35488c749bc309a0a18df102
font_01_sfnt_off000100c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C3 11340 bytes
SHA-256: b34e400e8b0b6ee448201d6ecd50202f71d12a417ef98ef1639b92592d365e96
font_02_sfnt_off00011b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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