Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ea7473a895ee6e…

MALICIOUS

PDF

73.2 KB Created: 2021-09-13 08:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: cc1753689615d0c47fa1039d5c1a121e SHA-1: a96e38bdbe74948097094df2f47f85deed397381 SHA-256: 07ea7473a895ee6ea5c6cbe0f5986e1328e0e50744bcec188243ba78fc8e5ac6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://inwebjor.ru/uplcv?utm_term=wolf+of+wall+street+123movies PDF link annotation
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139ffd894487---96194547625.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/refovosu.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/54338002635.pdfIn PDF document text
    • http://byecook.com/ckupload/files/kutotakexudimi.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/sojefuxutaxike.pdfIn PDF document text
    • http://eiak.org/upload/editor/files/95995576591.pdfIn PDF document text
    • http://fukaofoods.tw/uploads/files/202109091633567071.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16130ce7a2bfbe---89680491385.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/rerona.pdfIn PDF document text
    • http://protetyka-lublin.com/images/wyswig_images/file/49851429048.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/f3d0075c9808b25b82d8892ccf3ce5ab/tufotorapigoxokirapi.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/83960314407.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/bozonejodafigeserewa.pdfIn PDF document text
    • http://sichera.eu/userfiles/files/lawosokajik.pdfIn PDF document text
    • https://ghnservizi.com/file/8173582956.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/wemozixoxiwitelimiwuwuso.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/62140568635.pdfIn PDF document text
    • http://ad.ditroinfotech.com/laportal/ckeditor-ckfinder-integration/uploads/files/dopanebaronotewesopejux.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/77709803854.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/14404346070.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_off0000b9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d1dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DC 17448 bytes
SHA-256: 348dc9a1654732cca92e1f1666b0ab3e8e31179d7935491627a16d19ff57a0b2
font_02_sfnt_off0000feb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB8 10760 bytes
SHA-256: 883c296ef1bb5729e7ca24f6b4f6bb1030e4217d379f5428d1977373cb100b43