Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ffe14cedaa23bc8…

MALICIOUS

PDF

83.3 KB Created: 2021-09-02 10:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 570990d2c865848f8e7abe0cc392d09c SHA-1: b58a26eccd49aa7353f982e110b74588b4c5f8a4 SHA-256: 7ffe14cedaa23bc8280639d62395138abd0b62158b8f444646b2bfc9860dfd14
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. This suggests the document is designed to act as a link farm, potentially leading users to phishing pages or malware downloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://pixomot.ru/uplcv?utm_term=exercises+to+strengthen+quads+and+glutes PDF link annotation
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/wixolivezig.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c37c7fd4b6d---22486654213.pdfIn PDF document text
    • http://cordovajewelry.com/images/file/78283508334.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859fe611d55---78278177920.pdfIn PDF document text
    • https://shibbirs.com/media/files/23587744019.pdfIn PDF document text
    • https://tutorsbureau.net/userfiles/file/83941947000.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6906a4c55d---36188090578.pdfIn PDF document text
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/64055479759.pdfIn PDF document text
    • http://engcaphone.com/_UploadFile/Images/file/zebidi.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a9f908ec9---30901971284.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/b467e71cfd9ef58506c131b8391f113c/55820058049.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5694973fb4---romiwawedikisa.pdfIn PDF document text
    • https://projectmine.hu/ckfinder/userfiles/files/nukiwu.pdfIn PDF document text
    • http://electric-kernbichler.at/76142556879.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/89383293073.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e4af388dd0d---6870361560.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/gomewirivekozobet.pdfIn PDF document text
    • http://zekidilektekstil.com/images_upload/files/81173632034.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607997f8b0b8d---voxagosi.pdfIn PDF document text
    • http://www.polni.si/Images/files/kokovipawulufefevotikok.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/xazupunomamegama.pdfIn PDF document text
    • https://www.akilciilacdernegi.com/ckfinder/userfiles/files/67021787831.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bb94e231554---xosunakogepudu.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608675c7b277d---96163275366.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16079fe054d634---49214847494.pdfIn PDF document text
    • https://mexico-airport-transfers.com/ckfinder/userfiles/files/junonedonugefalusove.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/7f96330fc393bee05241708bd6dd00e7/74712238811.pdfIn 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_off0000e1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CF 17192 bytes
SHA-256: 47ac8d587ec3e5787b49e642d75d825ad2227841ea197715cc30075faf92a9e5
font_02_sfnt_off0001265a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1265A 10980 bytes
SHA-256: 69b6d7ff57c77a19ecbae59fe78ec8f74768cffbc23b310cb486046a261f8f4a