Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f86013492dc8f2c…

MALICIOUS

PDF

86.6 KB Created: 2021-06-28 09:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5170d2d029166eb8199d66d1a9aa0cc4 SHA-1: 228ab73dfc1fe0ca4a64d108108534d81f8066f9 SHA-256: 8f86013492dc8f2c675fbb874cbd03fbab8a80fa724e1658d3d1708710401899
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs are designed to lure users to potentially malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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://afghansolar.com/userfiles/file/84125781630.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/8640610e38a83189017e907023ca8861/fatosutirogofafino.pdf
    • http://accessiblevehicleservices.com/userfiles/file/rulakifepagaporuzixiru.pdf
    • http://cropscipublisher.com/files/upfiles/file/kexadipodugukevawel.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/276fcb61db797a9e3bf308cf256a4673/16054122901.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4c9e86035---begowewafewaginewuke.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/a64f378cda9a360ba2374abd03955ab7/2565340845.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/0e8bf797fde7a393b67ffc60761c6dd2/703284008.pdf
    • https://weyergans-hcc.lv/userfiles/file/97935077053.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074503f965cc---91970004561.pdf
    • http://armanetti.com/images/23191691455.pdf
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/30gk0mvdeoj8al4gjckd087qg5/madinil.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/167bab514e237a5d7b4672461271d86f/lexamejanefutodikinoxo.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/0fed65fd1126f5cd3b00bba06a949b8c/30731291231.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/836f9021b78f61b038f43c4df41a8c06/72937274537.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/58e6921a957698b8c8f6276d6bfbc0c1/13199521167.pdf
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zukupusifapemedurejo.pdf
    • http://banhangcongnghe.com/upload/FCK/file/17764959037.pdf
    • http://wardwrightself.com/clients/863644/File/vutobububesotir.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/4710695457e8918d18ed29062b20f072/11721689533.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf628a13a2b---tawukonizikopanazanizozu.pdf
    • http://euro-ex.com/39716182968.pdf
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/25344006223.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/d8ae0768636244392e82e26d6d04f555/59816041165.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=the+age+of+adaline+streaming+vf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d552.bin
1ca2da2f9e304dd72f294d786a2faf31c61a54468c483ee6cf7f1f446a52b621
pdf-font-stream PDF embedded font (sfnt) at offset 0xD552 19492 bytes
font_01_sfnt_off000104f0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x104F0 16792 bytes
font_02_sfnt_off00011d07.bin
6efd8e961cf24d434cfabc4ec0487dcf53866f7e6938aba1439b0a43d9087823
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D07 10832 bytes
font_03_sfnt_off0001359f.bin
74ea40c6abafff908ba0a862ebf25ee1d47d31f530ca964bdc695191fb21b084
pdf-font-stream PDF embedded font (sfnt) at offset 0x1359F 16116 bytes