Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4f2d98e0eb2dcb4…

MALICIOUS

PDF

68.9 KB Created: 2021-01-28 07:46:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 30ad627a264f96a88effc740c261ed03 SHA-1: bc14773110850cde869d817046a3b1597c8ca558 SHA-256: b4f2d98e0eb2dcb4eb41f855b5a66d52e453813877ca235451841d0eb1f7dcd3
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://yafferge.ru/wb?keyword=createrria%202%20craft%20your%20games'. This indicates the document's primary purpose is to lure the user to this external site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://yafferge.ru/wb?keyword=createrria%202%20craft%20your%20games In PDF document text
    • http://drovazvenigorod.ru/fugorukulixonixavrlll5.pdfIn PDF document text
    • http://hookup671.site/wowigo0jobr.pdfIn PDF document text
    • http://instasale.company/function_generator_online_mathyycvk.pdfIn PDF document text
    • http://tesocoin.online/73268806607hsr23.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/nelizenejakarug/jasoridapej.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/league_of_legends_runes_reforged_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/bjcp_mead_exam_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/captain_america_shield_wallpaper_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/nccn_guidelines_hypercalcemia_of_malignancy.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/djamila_ribeiro.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/kuxulomoduko.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/wide_format_laminating_services_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/background_design_hd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/gdi32._dll_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/a_b_c_d_movie_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/7614106788.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/ziredokujawosonowuxalizu.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/68811625325.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_off0000d18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18D 5308 bytes
SHA-256: 660f4db7ce7cf3ec69898f6fe527c944855a1efa053b2032d7f52e46ca0adab1
font_01_sfnt_off0000e394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE394 10268 bytes
SHA-256: f877467abef55ed9f24a04987efc88bec4298b1086efb727fc81a43ce046d09b

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