Malicious PDF — malware analysis report

Static analysis result for SHA-256 30d9bb4562e21f9a…

MALICIOUS

PDF

98.9 KB Created: 2021-06-26 02:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2405f58cbee8afb714d24407c6bc11f8 SHA-1: c8476d2800cc6f3f1f230fb02a4f3dbe822394d5 SHA-256: 30d9bb4562e21f9ae800fd7450804882bf4bdcc13c3074b4620ea782e8725fab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with malicious PDFs designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a84212dc3ab---nemejitozov.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090c79ed25ff---tibaxorutaluvarovite.pdf
    • https://hostingyuvasi.com/calisma2/files/uploads/lasivenojoredipo.pdf
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/ko5m9dt44f7l16ilqcod5gmq3c/rasunexomos.pdf
    • http://jagodkaprzedszkole.pl/userfiles/file/93950635243.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/370c60b9522b157f2b0ff6f528b8edde/rivati.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8534efccb---58797929585.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f5faba3ab---43160610336.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/3e7c80b8c15ab34dc70998bc13575410/moxifetofobax.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ebb4af5e4---50044689447.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609415c7b885c---29325611412.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/5a829976d0aab72296b265702abf41ad/17248670625.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb6989ec01---22734553029.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/3in4buieo684ho045sekk6uqh5/meromutawose.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/08oh7jbq5gvv1u7vksi1mc7fr6/44338156547.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/r67vd1n87nceun8baiseocunh0/fuzenana.pdf
    • http://asiavent.com/UserFiles/file///musit.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/b7e71da0246cec42ee38cb03d6cab233/79577278016.pdf
    • https://beauti-full.ru/uploads/files/duvov.pdf
    • http://adainst.com/uploade/files/20210626050930.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/0163bd873985ff5753b42c8b00d95100/jefaxajugonewiwatuni.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/50e8a0a636856be8cbdd6f5aac658976/7312068095.pdf
    • https://ajitcoatings.com/uploads/delejisuwurape.pdf
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/401ec3dabb6bf3e4d92267d221ab702a/74408563772.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=volume+element+in+cylindrical+coordinates
    • 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_off00011cd0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD0 16792 bytes
font_01_sfnt_off000134e2.bin
f8c43460af4907e7ced2d6f91a6655777011795453a0216e70cf2183ba55d0e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x134E2 18136 bytes
font_02_sfnt_off0001656a.bin
0b383f27bdbabd03b20b4bb13e192639955711ae36f5b5637984c3c08030df30
pdf-font-stream PDF embedded font (sfnt) at offset 0x1656A 10712 bytes