Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ae0ff64592b588…

MALICIOUS

PDF

84.8 KB Created: 2021-09-06 01:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7fc64effbaa50e83be7a5ff60d8f0a06 SHA-1: 6c592bac98aaa35a14c44dad974f14e2d1ba0ac9 SHA-256: e7ae0ff64592b588ba01627aa7fdec24602dc15d379418f0e6c26335cdd4344e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting. The embedded URLs suggest an attempt to direct users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://gostinica-domodedovo.ru/files/5381673641.pdf
    • http://lohsclassof70.com/clients/3/31/31ca850ff086a58b81c8700e10a01852/File/72346234484.pdf
    • http://bmcnx.com/userfiles/file/ripanufagupodobuxiwi.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706ed1e81b6---26407032632.pdf
    • http://fittbike.hu/files/file/83888730967.pdf
    • http://anandtouristcorporation.com/uploads/sikewetuvefagokaj.pdf
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/86062793016.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/3chpgoh5u14f42a6qd8oqc55mg/wizelovimetitotomosari.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/htnjk6gmfj2f75fli152ohnm2b/sedulelezisafifowipof.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbe6a7dd7a3---79687396006.pdf
    • http://anhbanglaw.com/userfiles/file/15074618401.pdf
    • http://sgyscom.com/upload_fck/file/2021-8-16/20210816220116796864.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc12f8da745---63640649469.pdf
    • https://fetogram.ir/images/upload/files/82512909678.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/javu4s894g6oiiq220vb0shm39/29758791028.pdf
    • http://ahdongjiu.com/upload_fck/file/2021-5-2/20210502040248845575.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1607810bd280b4---56321683837.pdf
    • http://vitanova-cattery.com/upload/file/jafuzevivemivapixosuvuwep.pdf
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/rapozi.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/860f554aad2ffc23c8d495a9d2f61d92/fuvepozifixizar.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610faf915a3f0---wivatisivepoge.pdf
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/825b2ae1b4403e821eb0024501bbb64f/texaf.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=radial+nerve+palsy+pdf
    • 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_off0000e6b3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B3 16792 bytes
font_01_sfnt_off0000fec5.bin
076434ada7aceee53baed0a6378e9a9be230ae60047ea28da45c8ab3096cf1a4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC5 18376 bytes
font_02_sfnt_off00012db7.bin
34bb5d19fe4e332cd5f3df55ac69844235a95d6a7df318b172fb09915da76b61
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB7 10496 bytes