Malicious PDF — malware analysis report

Static analysis result for SHA-256 8818f279b897b2d7…

MALICIOUS

PDF

70.3 KB Created: 2021-06-13 03:25:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f7114e3afbe2eed295c25149513c619 SHA-1: d6d381798a22458fcc94ab625e61f8bd18a87a15 SHA-256: 8818f279b897b2d7fa84b75298187ff228b9e779099ead609add8644dad38407
174 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, appears to be a lure related to 'business law ca foundation notes'. No scripts were extracted from this sample, but the presence of multiple malicious URLs indicates a high likelihood of redirecting users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9450

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • 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://smidgel.ru/uplcv?utm_term=business+law+ca+foundation+notes
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/2ca0cf8cefc0906b01d11a6ae7c0316f/95963002917.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/ffe8bc13768aac0c1732bb0fb2181ab4/22120614540.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160988e1e3f6b6---dumibanalizifetoxabuf.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f681c4990c---bijudalazan.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/rcnf4jlfdu2qu445tr5db9r9ge/zagaz.pdf
    • http://kangs78.com/clients/66216/File/2292573549.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/b2d805a6867629fbfbe152ee6ebd2ce9/32993904014.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1608727291a0c1---zenopimejufapofom.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa504adb92---75198984173.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c335422177e---51602278589.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/f44c185409f5be62eaf941e35916ee35/55364190837.pdf
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/28a5c3818a5cc5ba9fb37f08c0e493b3/52546904835.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/2cbc63pkiqtbkq3flllr4ocfn7/nexoxu.pdf
    • http://mispuntossaga.com/campannas/file/98865310102.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/6a78c42addf0a4bcf7a5380bf4fb2d0d/wesarolan.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b1209353288---39166832296.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a141f0e2498---kivuxutujukumafewamegige.pdf
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e246.bin
b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
pdf-font-stream PDF embedded font (sfnt) at offset 0xE246 6744 bytes
font_01_sfnt_off0000f32b.bin
7e271850636907b10032882934e80f564dc769154de9064140dd8b6f752bbff8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF32B 5060 bytes
font_02_sfnt_off00010487.bin
28277323e542704c787dc035995a6e8b78b96b882c3cc70c46ed52b8a501460a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10487 2956 bytes