Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc6e72fcca95c980…

MALICIOUS

PDF

84.0 KB Created: 2021-09-17 10:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 982792e2080b79de07c8c68b29cde310 SHA-1: 02e868329d0d74c314ea25aa20621db67ff4ddbf SHA-256: bc6e72fcca95c9807740d34d60f9736770a446933d78d7df5b920984d9c1e829
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised WordPress upload storage and other unknown domains, suggesting an attempt to host and distribute malicious files. The presence of numerous PDF links and the ML classifier's high confidence score indicate a strong likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613edd2659363---wasaxud.pdf
    • http://seteo-dechets.com/images/file/5437298312.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc8050a71c---koxemojijo.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613910ced92cf---65740305055.pdf
    • http://rotarybrescello.it/userfiles/files/lumaxekimudineb.pdf
    • http://quiltingacademy.info/fckeditor/userfiles/file/96197572220.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16142afc352d93---vizavekanu.pdf
    • https://pmsp-me.com/userfiles/files/24351808986.pdf
    • https://takitech.hu/userfiles/file/91636350738.pdf
    • http://thumpamonpally.com/userfiles/file/49706469029.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16139ffba8cfa7---jafijobimufiru.pdf
    • http://africareview.in/userfiles/file/59839385970.pdf
    • http://dobrejaja.com/Upload/file/108534295.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/qs8u96ff7vsl1r1eg1ga52oojm/sununujarigadofozudor.pdf
    • http://antoniolescio.net/userfiles/files/32448180769.pdf
    • http://topbondtape.com/uploadss/file/75001790010.pdf
    • https://nurea.se/currency/userfiles/file/8563788888.pdf
    • http://asia-test.informacittadino.net/media/files/44172134908.pdf
    • https://cepatdaftargroup2.com/contents/files/55124384670.pdf
    • http://mitcostruttori.it/userfiles/files/dibudumojixutakew.pdf
    • http://artdental.hu/editor_up/welunuterasukuvajufuxolu.pdf
    • https://kaplaitalia.it/userfiles/files/94449156392.pdf
    • https://knurussian.kr/DATA/upload/files/202109080223464828.pdf
    • http://dhf-china.com/d/files/73638988639.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=pokemon+apk+mod+offline
    • 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_off0000e065.bin
3dcf84fa36614921f0422c62626816063e214311898b813a0f45f9f6ab94f792
pdf-font-stream PDF embedded font (sfnt) at offset 0xE065 19240 bytes
font_01_sfnt_off000112a0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x112A0 16792 bytes
font_02_sfnt_off00012ab7.bin
7f0cc5bce294ae67624c44c232e8a8eeec9f8c684a2b7bc7f1d07009c3cec911
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB7 10388 bytes