Malicious PDF — malware analysis report

Static analysis result for SHA-256 f919211a4454f2c7…

MALICIOUS

PDF

56.8 KB Created: 2021-02-25 15:18:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 00f3d70b7a5d104a4fbd18c14215942b SHA-1: a22462dec042df83dd2566f2a0aaf579440d4b46 SHA-256: f919211a4454f2c703f729be124c9e956507dcdadb6b0824936231fd31eb0584
124 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains references to 'worksheet' and authoring tools, aligning with the heuristic that this PDF acts as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://jottigo.ru/award?keyword=author%2527s+purpose+practice+worksheet+%25231 PDF link annotation
    • https://cdn.sqhk.co/zudilubal/J9wUMgj/wallpaper_black_shark_hd_android.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/eljfij3/pocket_ants_colony_simulator_wiki.pdfIn PDF document text
    • http://ig-copyrightviolation.com/descargar_corel_photo_paintfv4k4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392861/normal_602b74c94c3f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374542/normal_5fcdc252998db.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/no_game_no_life_manga.pdfIn PDF document text
    • https://cdn.sqhk.co/senagoxosog/gemNjhR/50167105581.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382771/normal_6005afbb840aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479454/normal_5fe08fa11edce.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/gIjbWgj/reminudorekofajesujutowin.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/metodologia_dela_investigacion_cuantitativa_santa_palella.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/ricidig/planet_warming_topic_of_concern_crossword.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477401/normal_600f44e0e2249.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/dot_product_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/ableton_live_10_suite_crack.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B0 4944 bytes
SHA-256: 2dacfffff158c682a12c61f72d48baa625f9f50425401b9631801e7fa9e176c9