Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d64dd052bcd0e0…

MALICIOUS

PDF

66.2 KB Created: 2021-02-11 11:19:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: b8b8e11c3d547dbb91c9fac56749c617 SHA-1: 05dac20f82459273acb921a087d5649f7b8ac48c SHA-256: 72d64dd052bcd0e0fd6b8973a12acc17e267b7ee805ef958d79aad74fc8bf0ec
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the presence of malicious links suggests an attempt to redirect the user to a compromised site.

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://yafferge.ru/123?utm_term=lg+bp550+manual In PDF document text
    • http://sizegivip.22web.org/16345015239.pdfIn PDF document text
    • http://belkwigs.com/dungeons_and_dragons_players_handbookpch5r.pdfIn PDF document text
    • http://geosen.net/29504796728ssj11.pdfIn PDF document text
    • http://ig-copyrightnotice.com/african_symbol_meaning_strengthxaeqr.pdfIn PDF document text
    • http://stickerrus.ru/instant_pot_ip_duo60_manualg0zfi.pdfIn PDF document text
    • http://frut-tree.site/20477898742ck9mt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mujesogi/32830952166.pdfIn PDF document text
    • http://roxonotagake.rf.gd/bundeslnder_karte.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/besame_mucho_music_sheet_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/winchester_va_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/nebulizador_aspen_nu400_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/dingbat_quizzes_and_answers_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/sivepibogudevetux.pdfIn PDF document text
    • http://ribigilubawedom.rf.gd/63357423865.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/spider_gwen_wallpaper_s.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B1 4736 bytes
SHA-256: 3709b0f4ddf9e9cc71c33c5fb9beefa8254af4b91e54f34df743228d23455dbe
font_01_sfnt_off0000c9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A8 10724 bytes
SHA-256: e4412a713e89066cfbc2dba787c1e3f5ef09c90979411730f062eb195c072017
font_02_sfnt_off0000ede9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE9 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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