Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cec17933b7cfbcf…

MALICIOUS

PDF

86.2 KB Created: 2021-09-02 03:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 68057c2a08ce5476fdcce4f1d22f2afc SHA-1: d7316d07cb191d6153460e8a133ace27dc4aef51 SHA-256: 0cec17933b7cfbcf22ae2cc500d7795801d9546dce7dc3fd4df31fee1dde2493
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 https://beliangka.com/contents//files/22458025651.pdf
    • http://lycee-elm.org/userfiles/file/zolazikitulesubu.pdf
    • http://vikingpaint.com/user_file/file/90421858707.pdf
    • http://dnepropress.net/files/file/zonilojalava.pdf
    • http://abwcolley.com/uploads/files/zepuwagisamerorukaxugoguv.pdf
    • https://raptiherbal.com/ckfinder/userfiles/files/59087375800.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/15e13002c86fbb50f35a826aecd2f41a/todelusejanam.pdf
    • https://crownprolaw.cn/userfiles/Proj_Name//files/18808462372.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160826b765a7e0---ruwuserexipepuwigalo.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/9adc91019f46ee9567f4cf88f6c6cac4/83539035334.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/9760a1af35fa7ac408b3edc8803e5674/wolod.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610321b4858a5---nadokogifivudesifita.pdf
    • http://kraski-chernila.ru/resources/file/mokapodaraxapu.pdf
    • http://paramountswimwear.com/userfiles/files/33406332614.pdf
    • http://www.awakohchang.com/image/upload/File/ixolugaxisuxa.pdf
    • https://5uempat.com/contents/files/puwumuz.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/e5f8ceb3075a278612f0aafbb4f588cb/dujubokavijobesiritutuz.pdf
    • http://skinanniversarymall.com/userfiles/file/fotosakufaxedibufugavuf.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ab2f6f163---nozarivobinupesowotopupi.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/3d2fe61d7e241e1fbbf23ba31523c818/pilomobogiwinodor.pdf
    • http://cokhiminhhien.com/media/ftp/file/sukobem.pdf
    • http://karunb.com/UpLoads/files/fufiwiwugixamefab.pdf
    • https://www.cosanuesa.com/componentes/editor/ckfinder/userfiles/files/guvosebugixonuwefinobujex.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=company+allied+matters+act
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e88d.bin
74db1d2c88855f4ac59cac8c53325dab456251b8cc280a22057f39fd21575ae2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE88D 18236 bytes
font_01_sfnt_off0001178f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1178F 16792 bytes
font_02_sfnt_off00012fa6.bin
70acf137428c0c448824d0e0122671d9dd74f51255d76c328bb6f07d70f16feb
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA6 10820 bytes