Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a16b4019bf836c…

MALICIOUS

PDF

73.3 KB Created: 2021-02-27 06:16:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 69b6baaf135785a1f1ed9bc7c5909811 SHA-1: 113aa19ed84266f1047e7930a29ca726c3613586 SHA-256: 70a16b4019bf836c99ed8b541523cbd2639d79b9488288ac64887f49c896f9fe
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/wix?keyword=in+watermelon+sugar+pdf+download'. This indicates the document's primary purpose is to redirect users to a malicious site, likely for phishing or malware delivery. The ML classifier and ClamAV detection further support its malicious nature.

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/wix?keyword=in+watermelon+sugar+pdf+download In PDF document text
    • http://soul-felt.com/catalogo_perfiles_de_aluminio_boschmok5y.pdfIn PDF document text
    • https://cdn.sqhk.co/goganededem/jDiakad/cute_anime_boy_hd_wallpaper_4k.pdfIn PDF document text
    • http://coolstudent.space/express_entry_profile_creation_guidefah2g.pdfIn PDF document text
    • http://afracheat9.xyz/portugues_brasileiro_para_estrangeiroscmvzv.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzitomizaj/ysEhaRx/dream_champions_league_2020_soccer_real_football.pdfIn PDF document text
    • http://priz24.site/rapobak2pymv.pdfIn PDF document text
    • https://cdn.sqhk.co/dajuzafum/t6Igiic/59816091819.pdfIn PDF document text
    • http://damvglaz1.xyz/advanced_formulas_in_excel_2013ebxf6.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/fivigexoneku3wzlm.pdfIn PDF document text
    • http://lebizifijafaxim.medianewsonline.com/what_can_you_do_with_a_quantum_physics_degree.pdfIn PDF document text
    • http://elerctum.org/15515851407mxtnt.pdfIn PDF document text
    • https://cdn.sqhk.co/setawigiz/BbiMhiW/make_animated_stickers_for_whatsapp_iphone.pdfIn PDF document text
    • http://prizinsta365.online/free_natal_chart_report_online24bzz.pdfIn PDF document text
    • http://life-news.tech/acrimony_full_movie_freewflzx.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/sitozi/gefomese.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/avantek_wireless_doorbell_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/ashwamedha_kannada_movie_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/29323548291.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/96874687578.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_off0000d4df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DF 5224 bytes
SHA-256: bea014229b0056260e8c8eeb272d2aef453fa4fbd466e45fc4889cd3000db325
font_01_sfnt_off0000e698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE698 10408 bytes
SHA-256: 3d892add8820033306899702714bc380b9a4518610f972e590e36ee3bf838a52
font_02_sfnt_off00010a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A13 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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