Malicious PDF — malware analysis report

Static analysis result for SHA-256 489e0f4d70c73f00…

MALICIOUS

PDF

84.9 KB Created: 2021-07-19 19:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 39db318bebb819ce80a21d194e5137a1 SHA-1: 6c03326a2bb155a745678149b85fff85f55b1f6b SHA-256: 489e0f4d70c73f00ff362ab28fcea047eee64131baffda0bd6a67c78dddb779b
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites and are structured as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites. The presence of multiple links on potentially compromised infrastructure suggests an attempt to distribute phishing content or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/gexajalosojesewofu.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/6f981c8a6469f7a0394bb279303f74cc/38441025366.pdf
    • http://ceraunavoltapizzeria.it/userfiles/files/57302642573.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/3d8edd9a210bc49ea4d0c2225790ed47/rumuguduxetelikinurusug.pdf
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/wawusafobojumagilinu.pdf
    • http://assushop.com/userfiles/assushop.com/file/zetoxufigepuse.pdf
    • http://cowmoo.org/ckfinder/userfiles/files/26345085098.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9f76dbf88---kilikebipitepinotonevejul.pdf
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/ec2285ef321e14f6c5f3714b48dcd4c0/599883939.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/ea65c426b31322d42198d3e9955b02ae/40200747682.pdf
    • http://gleneaglehoa.org/images/file/wufavopipenafujarov.pdf
    • http://alpha-th.com/userfiles/file/subilofetitalukegologa.pdf
    • http://texmet.pl/userimages/file/zimobal.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b76ce3363---kenanurixomawulutapuzej.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16090febaac582---xilebotirijesarur.pdf
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/e86a7eaee0d4de237d972e252c908045/69365764905.pdf
    • https://theatresaucinema.fr/uploads/file/betavipixata.pdf
    • http://madonnina.info/userfiles/files/18757860670.pdf
    • http://vorne-sitzen.eu/pcms/content/file/rapide.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/22332aab20c80890fae61c8f013822be/12088955206.pdf
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/0c7926f7c884de2d3898c72f7f69bdef/wugameluvuvom.pdf
    • https://uangraja.com/contents//files/takagulilugepexisutov.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=streptococcus+flesh+eating+bacteria
    • 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_off0000e778.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE778 16792 bytes
font_01_sfnt_off0000ff8a.bin
5b8fe80c7423e3d9d0ca12af5545adbf4339cdf2b3344ff757a4a09497bcdacb
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8A 16896 bytes
font_02_sfnt_off00012b77.bin
49b9196dea4c6e8b73d58d0f1f3971387296f6044a517f1f1e2feffcb9a39f0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B77 11072 bytes