Malicious PDF — malware analysis report

Static analysis result for SHA-256 782700595720e062…

MALICIOUS

PDF

79.0 KB Created: 2021-08-03 23:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 05d75e113cb35d3406bf718e2aca411e SHA-1: 812189c32cbab4ad711c6e0ac9c951d3df04e6ec SHA-256: 782700595720e062b96a9c8d0016271b9a9b100a08d707a835b391a4bddac6ab
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to delivering a secondary payload or phishing content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7215

Heuristics 5

  • 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
  • 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://rumahbaruku.com/contents//files/zokanosebajaduvakuw.pdf In PDF document text
    • http://headlinesdinerla.com/uploads/files/rutujusidozefozixi.pdfIn PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/48742801311.pdfIn PDF document text
    • https://khangle.vn/uploads/images/files/ribed.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/23qb5q2goo6tnefro43o0gcb4c/60653243705.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/daseliresesemewupo.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/47mp5ird2it3cplprthmec6ddi/xuzatavefejepixula.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090cb6161173---81860425504.pdfIn PDF document text
    • http://hzkontejnery.cz/ckfinder/userfiles/files/75255295507.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/zubuxikek.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/2unhog5u2f9p6aubr87u1c49b5/94415861619.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/rusavuzawomojesufujaz.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/561jenpeou2g9q3qse1m3mv865/35475335192.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec20bc7b97---pulunewojoki.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077892c379ef---75938427034.pdfIn PDF document text
    • http://paynechapelduquesne.org/clients/9/9b/9b910c66cef3ae2d1bb1fd5804160a19/File/12178422567.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609de6ecc322f---30973600323.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/58006194953.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7751995139---majubinuvotuw.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/1dc475cb1288147fce61ab5b6e740ce2/80619355736.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160792980172d8---xinutod.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/8e04f01f68634e08fcba4df614aeedf7/xoxomojelobikumugobosele.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=what+fruits+can+green+cheek+conures+eatPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D8 10752 bytes
SHA-256: c3cdf919b57cb74bdb9e03af5b701476ede2bda8e622d7f19ebabc84a33c50da
font_01_sfnt_off00010ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA0 16592 bytes
SHA-256: 5cead889f3d9b1d06e6db3a68dc6d2c448e9006281f2887c539b18c02a23b235