Malicious PDF — malware analysis report

Static analysis result for SHA-256 089b7f746a85f973…

MALICIOUS

PDF

78.4 KB Created: 2021-05-20 04:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c5fb39b0bd0eaa1540bf57c75c11c27 SHA-1: fe26dffff2b0cc584e6283199b2190f983d78c6b SHA-256: 089b7f746a85f9731a2594152dce41be2dbe2c3774dc64af8a5774c4fd182c15
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily corrupted, contains references to 'Michael Jackson Moonwalker game free download', a common lure for pirated software which can be bundled with malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://spherule.org/wp-content/plugins/super-forms/uploads/php/files/c2abccefb6b4a461410a1f724831bae8/likoxutuk.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/6fff030da29f8f7f627591e339cfd0d8/91666931462.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/751ad3d91b7b42eaff5245b8bf870126/sadomogutiwexaxetu.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/c3eb6b36ffaf6fd1a19c911ef229c8dd/basemebowulukumoni.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160989f321ccd6---65426974132.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e72c357471397084dc7ba5aa3a6ae3f0/tekewinituzijumurivesiwix.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/9lkia1mtmaac2h2gf0augkl4j0/zuketizopafizekuzafizudi.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/e92206d4f27a0a738177e94e6490212c/biwejipopigawizetafuwup.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160758b3306f6a---49857103239.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a03ed175fbe---bitobitew.pdf
    • http://skolicka.eu/foto/images/file/kanerarigosenudebugeman.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606efbee4e198---mikuzeganupojusefij.pdf
    • http://aep-tc.com/cache/fck_files/file/zivewurovubugerades.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080f82e8ce44---97344905555.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/e2931341a2e644c70289812695f998f9/laxetisaduxu.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/a2b9c31f7022d0a730fc320ebc07b3a1/xevetos.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16084a4d84491e---sujodisivafoxofuwivof.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/d7b784198862349de1840a403b9518f8/43161924580.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=michael+jackson+moonwalker+game+free+download
    • 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
    • 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_off0000dd2d.bin
7d874e7275ae12b2c46d8533b60776c353edde4b8c9f6c9dd38308d430b026e3
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2D 5672 bytes
font_01_sfnt_off0000f06f.bin
7dfb72bc3f63c45802da01233a784528763d15e15b74d84f1362c085bd29af1a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF06F 10672 bytes
font_02_sfnt_off000114f3.bin
c8cad0fcbf711734ba90d1bf0f33d5774ae0d43a5fc07b95f2d0d23150af1919
pdf-font-stream PDF embedded font (sfnt) at offset 0x114F3 16088 bytes