Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8cc735f4dc4a2d9…

MALICIOUS

PDF

85.7 KB Created: 2021-03-20 10:32:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: ab4c353ee6e0443ca519f37163de820f SHA-1: 525c3f321661f3b6af32fa6c608669a9eab1ba65 SHA-256: f8cc735f4dc4a2d94291124a09d5fea962745d2810b1c3ad4638fc8838b8a350
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://dafemum.ru/wix?keyword=seduce+me+at+sunrise+pdf'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://dafemum.ru/wix?keyword=seduce+me+at+sunrise+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417129/normal_604a9353a1733.pdfIn PDF document text
    • https://cdn.sqhk.co/vogoxaginoje/hds088U/72064138916.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480897/normal_603e73e32736a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495854/normal_5feef54f3e815.pdfIn PDF document text
    • https://cdn.sqhk.co/rixakowu/cCVsJAQ/neon_pokemon_wallpaper_hd_android.pdfIn PDF document text
    • https://cdn.sqhk.co/kesumixom/crKghon/xerixugamuxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376380/normal_5ffc2b891376e.pdfIn PDF document text
    • http://dizititakozazi.mywebcommunity.org/green_eggs_and_ham_book_characters.pdfIn PDF document text
    • https://cdn.sqhk.co/tobamozusaj/PjfjcZ7/business_calendar_days_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/jesotipo/jy1cifT/2104631046.pdfIn PDF document text
    • https://cdn.sqhk.co/tesadubozino/jjibHhb/cubic_and_reciprocal_graphs_worksheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480753/normal_6006e39bd0289.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411683/normal_603883e52c0f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417658/normal_600a4af90881f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379491/normal_5fde71936011a.pdfIn PDF document text
    • https://cdn.sqhk.co/tewisifupib/bL4ij2g/white_chickens_with_feathered_feet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369330/normal_6033dd81d157f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389127/normal_5fd821b2ee383.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/horse_blanketing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/display_driver_uninstaller_ddu_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/78258888706.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/58343150172.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001111a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111A 5372 bytes
SHA-256: df6bd51d9f171ec31995c60e082022cd01a0e996c42d008880ddad3f5701afa8
font_01_sfnt_off00012345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12345 10800 bytes
SHA-256: 8221ebd88fb1eedf746cf1a9eddf33323e51811d06dcf319a00958dbaa0d1a49

Open this report in the interactive analyzer, or submit your own file for analysis.