Malicious PDF — malware analysis report

Static analysis result for SHA-256 e586950b9a0f762c…

MALICIOUS

PDF

75.8 KB Created: 2021-01-21 17:50:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f8ee23ed98a5f2d1c5b52b3b226cba33 SHA-1: b3590c3301efc9c77643e8a232e0956876a89225 SHA-256: e586950b9a0f762c96770670fc229a5be22855c8400ee82d4391c3c88da19541
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 'traffmen.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to lure the user to a harmful site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/123?utm_term=7th+grade+geometry+test+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4372963/normal_5fee7ebd77679.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451363/normal_5fd1029cb56b1.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/iPhAgjD/40753291516.pdfIn PDF document text
    • https://cdn.sqhk.co/febenanedibu/hizwQhf/ligubonag.pdfIn PDF document text
    • https://cdn.sqhk.co/folamudoj/jjFignz/60_parsecs_switch_review.pdfIn PDF document text
    • https://cdn.sqhk.co/xewumoxu/ggiA88X/nunudofepatazuduvuvugubi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382003/normal_5fdc050c608c4.pdfIn PDF document text
    • https://cdn.sqhk.co/refimadaraze/jbDibss/menu_harga_domino_pizza_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/nodewanase/jhmmhjg/movie_nightcrawler_actors.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417306/normal_5ffd69b0656e3.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/vabedafozo/82704649384.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/bleach_brave_souls_apk_data.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/coordinating_conjunctions_worksheet_with_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/bulk_url_er_chrome.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/astrology_101_book.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/easy_voice_recorder_pro_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/matatojolapijafotupon.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/29560344537.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/likejolivesuzubolagaf.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_off0000e79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79B 5512 bytes
SHA-256: 067ac55ff1ead51493f87bae1dd41c1088ae4fc4bc6cd0cfc8b6a68bc0a6e606
font_01_sfnt_off0000fa39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA39 11644 bytes
SHA-256: f31c3c2b1f432b80e0ffb442bd54b2e0748b6275129651ebce6ddd4a56caef24

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