Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f2397e2710d0917…

MALICIOUS

PDF

99.5 KB Created: 2021-06-13 16:35:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3f154a2798c02567053aeb0a09c5b900 SHA-1: 3eceae4f9f43151d34b5b4ba1baa79842b7ad75d SHA-256: 1f2397e2710d0917a3880c21c110c6b4dd940e79daf2c77199d4d33ddd4f2a04
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is classified as malicious by ML models and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'fifty shades of grey free movie', likely a phishing or scam attempt. The numerous embedded URLs pointing to compromised WordPress sites and disposable hosting further support this, as they are used to host malicious PDF files, suggesting a distribution mechanism for malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://huntic.ru/uplcv?utm_term=fifty+shades+of+grey+free+movie PDF link annotation
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160756fae17072---48335305913.pdfIn PDF document text
    • http://shreejians.com/userfiles/file/vabef.pdfIn PDF document text
    • http://hesexpo.com/img/editor/image/file/24855416431.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/2ecbaa12c83e344bc60d377a57c97b7a/71360024637.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/64774400503.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9f56814b1---90294844945.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160857cee21593---jabafikozez.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/rumoro.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/warovepebakodabepun.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b22a8b57e0c---71392666111.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa1038bed---wutexutumexuvatuxed.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/fka999g71q39cpq9hnsavohlk1/bebimageduwozesis.pdfIn PDF document text
    • https://etimes.mn/uploads/files/19254098337.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3859a376ef---ridigi.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/72223745154.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001475f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1475F 5408 bytes
SHA-256: 191e8bfae58dc135114597255c55b038f1cfe003a8eea164935090a0007ee4ab
font_01_sfnt_off000159b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159B1 11516 bytes
SHA-256: 6f2e4b1b344c5a9251f8c9b3cee4857174f07b20042d980a043bd576ae2d76da

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