Malicious PDF — malware analysis report

Static analysis result for SHA-256 9847041104f63df8…

MALICIOUS

PDF

78.1 KB Created: 2021-09-07 09:42:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 19368e90cb20eb65eed810bd3a0123c3 SHA-1: d00b57a54b5c644cef74ba7f55a555973ae60cae SHA-256: 9847041104f63df89c73bce78d6b95317a272d7c2bbb52d04435d765b36c0550
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to websites hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=jurnal+hubungan+etnik+di+malaysia+pdf PDF link annotation
    • http://kppzp.pl/userfiles/file/ruledupidiwowetebaporuded.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/5f382d69d4fdbe3001872bbef1a54f37/visaki.pdfIn PDF document text
    • http://citra.cl/userfiles/file/tosavajudogepumipek.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/2dkq5s7a2prkojl5vkg5a9bk66/77191678583.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16082310b0c0e0---korugopifatobowexon.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/11449917956.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/kogafuv.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/28e3248e995a96c3fe3443e3eed15f49/97712886335.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/43570767482.pdfIn PDF document text
    • http://rogersdesignhouse.com/uploads/files/buzezajibiwimagidipos.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/suteguzuduvofevabumuf.pdfIn PDF document text
    • http://anpharma.net/upload/files/86556395851.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/4e1b87c6cea39ebbcdc9a5c08d3bef61/28378388926.pdfIn PDF document text
    • http://gmei.lt/ckfinder/userfiles/files/zuvixerisenutaba.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a5ed029f2---gawatirusufevopavu.pdfIn PDF document text
    • http://wallsfamilyreunion.com/clients/876683/File/dewebu.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/4ffa550b0ab6c1522d0f02d64048b2b7/60678629130.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160782d006053f---24768996914.pdfIn PDF document text
    • https://jamuiboe.com/webroot/upload_media/wekituw.pdfIn PDF document text
    • http://secureyun.cn/uploadfile/file///2021071606584826.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/kitaxumiwisuliduja.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/f3u7vfma0eg4c2810i20lsqbi7/dilomebujibivosewera.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/zerumakepofigifika.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e270364b0---wavegoxenozoxenazo.pdfIn PDF document text
    • https://doi.org/1In PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFE 11260 bytes
SHA-256: 560446d39c004ff492691f777e7a9dfe55f1b423965179cddfd85c64c305701b
font_01_sfnt_off0000e5cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fdde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDE 17472 bytes
SHA-256: d5d99c2120b6e0c2314aee356d63cca5d40eb0ebc54ad6ce8faaceb09bea1791