Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d04b6da065b94ee…

MALICIOUS

PDF

92.2 KB Created: 2021-09-04 18:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 25bfd07c5b35e9893cf09ba12690a2f2 SHA-1: 11ccea02f3daf22e631f3ec1fe4e52103ab9fc21 SHA-256: 7d04b6da065b94ee085991483ddf0b0d9286e51d29ea0502c199ef4f0862a794
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_REMOTE_SUPPORT_LURE' strongly suggests the document is designed to trick the user into installing remote access software. While no scripts were directly extracted, the presence of numerous embedded URLs, many pointing to compromised websites or disposable hosting, indicates a phishing or credential harvesting attempt, potentially leveraging a PDF exploit to deliver a payload or redirect the user. The document body is heavily obfuscated, preventing analysis of its specific content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/65c43493bac76b8a1847341c06371e2b/38496616997.pdf In PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/3a9b973289500ce7fe126e2a56448ec0/lokifujibonesevupix.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/77549962338.pdfIn PDF document text
    • https://unosms.us/userfiles/file/nonez.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e76252722f---68080035046.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872f96a7980---5952584187.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/42115968894.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/96806671909.pdfIn PDF document text
    • http://aozbt.com/clients/3/33/335f642cf73e2ad82edc7dd4a76dad4e/File/76258629313.pdfIn PDF document text
    • https://rsebolivia.org/userfiles/file/maxemonedupoleselipos.pdfIn PDF document text
    • http://machin.kr/userData/board/file/lapobufisari.pdfIn PDF document text
    • http://lex-ter.ru/admin/ckfinder/userfiles/files/49291641705.pdfIn PDF document text
    • https://www.bosingels.nl/ckfinder/userfiles/files/62844247945.pdfIn PDF document text
    • https://rajakeempat.com/contents//files/vejozoturotodubosedewaxu.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/43903774280.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/80145118526.pdfIn PDF document text
    • http://ural-kip.ru/admin/ckfinder/userfiles/files/56675678953.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5a23399f6---dapivapakodo.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16093b5590d5ff---76389186810.pdfIn PDF document text
    • http://caogenzhiben.com/filespath/files/20210812200455.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/5482022353.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/09o63au82acver015sek497unn/86950456355.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/7i1t1c1nct3lnvnviobihegmfq/25904376767.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a86e92c018e---tepusekin.pdfIn PDF document text
    • http://atek-ent.com/upload/file/rekokiwanewupugometerufi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=comment+utiliser+excel+pdfPDF link annotation
    • 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_off0000ff47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF47 10852 bytes
SHA-256: 19c8f57f1e6f0bed697fe323843c55b7a47558605ece37a760ad9c7861e06881
font_01_sfnt_off00011855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11855 19536 bytes
SHA-256: 8ce382b702189a092547519e5bee6ab5d2bcafd3caff42f5093e0f59996bdf15
font_02_sfnt_off00014ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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