Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5e42d9eb55cbe5…

MALICIOUS

PDF

125.5 KB Created: 2021-06-19 18:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6e9db9bac64660bffcf8d1726b28683c SHA-1: a66aa77967f2a2d448f1cc8e0cb4c5579787c4da SHA-256: 2e5e42d9eb55cbe52e0c2214cfd136de3b71f9e500c11163579314c1e2af4ee2
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9134

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://queure.ru/uplcv?utm_term=gta+vc+100+save+game+android PDF link annotation
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/32734d129599df5d7a728ae1580d5315/vabejoguvez.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/d7bqqj8c5h9o893h1vlsgs9u67/18536887447.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/vt0c19fhaa7bfv1n9hctfpskol/47856400019.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/b01793819219ada845f0d98e6ee7e194/nubewawu.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/68f7b93974323f3f0a0730d59b1d3af6/pewotevaduwakemax.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160952048a761b---pitowavaxojabiped.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c93126537e---78978561377.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089be5fa0b4e---94694234294.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/82054670339.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/40801507224.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/52318615132.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608854e8cbcae---kerefajumer.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/81449517587.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/974912340d315b4d54e8a749c1011217/10457581791.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4bc430414---wavamabowutijozagetox.pdfIn PDF document text
    • http://turnyras.lt/Files/file/84335115505.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/4f7ccf7e13efd505bc696aad46758571/zoviv.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b01bfc8693---jikoxotebezomukulipugom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E40 6440 bytes
SHA-256: 2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
font_01_sfnt_off00017e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E04 6820 bytes
SHA-256: f415e83c3bd79f17281a74e8684f4f4ea9e5c1bc9b4a025b2b9f3e6fcc6187ce
font_02_sfnt_off00019534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19534 5512 bytes
SHA-256: 4754afaba5df618d185c65f6dd2bd5b41e535d5162ba50c25b7ea6fd8bb97e05
font_03_sfnt_off0001a7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7ED 17588 bytes
SHA-256: 6f0edbd7eab6c653ed85aa6e76df5d88f340b172d7c4c557a92d2dd7b1902fdb
font_04_sfnt_off0001ddc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DDC4 16076 bytes
SHA-256: 6b13f8def256235e3ecdb6cd1b4534f0823fff5a25810a35c090d1b32d4fa7c4

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