Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba9b19d0534d339…

MALICIOUS

PDF

86.2 KB Created: 2021-05-06 23:31:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8365ff823f6cb4e31660552e9958f28d SHA-1: a0afce03e652e8abbf3d7c38f01d9b7e57d3f713 SHA-256: 2ba9b19d0534d339e17297a190b82b78c6ed92cf03e3bb9d168a5e6df09a55db
156 Risk Score

Malware Insights

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

The PDF contains numerous links to potentially compromised websites and disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/0f23b323fe051d29a3d4f97a34531fa0/76499430119.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/b89re2sg1p0u08273i75sqonq3/89521397980.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/88242009377.pdf
    • http://ndt-tl.ru/upload/file/gitipaganako.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/u7vmca810eokvdoocufjpf33aj/30974719385.pdf
    • http://alliance-ltd.com/userfiles/17066875779.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/82el38jqtcv78j5b7g6jcuidt6/45990047516.pdf
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/53c304d1992de571ef0bb9a51d80a356/vorefej.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfdaab78d8---64018737763.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0fcce97cb---kemufitifepudurofaxi.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1b9092d38---kezupirekamijufiroxiw.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/761bbd78f4ec64a965e4ab689f71962b/72661638526.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/lioj4862ils2urnu7hpphkht3r/66649106297.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=bose+quietcomfort+25+owner%2527+s+guide
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103ce.bin
fd5f3e04ade1dd913e0570e82cb78f4dc119a043f8d306790c5a6fa1119b6d0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103CE 5536 bytes
font_01_sfnt_off000116a7.bin
8931c83834c14efd1ff40efa74a602b776ddec8f1b2c720d7a08a8e20b7df1b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116A7 10856 bytes
font_02_sfnt_off00013b9d.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B9D 4324 bytes

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