Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65952bc48277dee…

MALICIOUS

PDF

76.9 KB Created: 2021-04-02 18:59:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab242b5d3a6f41c8fa640ed8feb446df SHA-1: 57864f98bffebf387142152c2b606db3bf320aec SHA-256: e65952bc48277dee804d0aff109db94a7828316ff81ac071cd8f4067ad737dbc
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/aws?utm_term=will+attack+on+titan+season+4+cover+the+whole+manga'. This indicates the document's primary purpose is to redirect users to a potentially harmful 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 redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=will+attack+on+titan+season+4+cover+the+whole+manga
    • http://euroshopmn.space/kevizemobumefupusabofs09r.pdf
    • http://reduslim-eu.site/axial_yeti_xl_aftermarket_partsaiz6q.pdf
    • http://tomandbxof.site/xujubizidizepobisobupuni55f.pdf
    • https://cdn-cms.f-static.net/uploads/4418973/normal_6017b825a1d3d.pdf
    • https://static.s123-cdn-static.com/uploads/4373527/normal_5fef0431d14a2.pdf
    • https://cdn-cms.f-static.net/uploads/4390659/normal_60302ae339037.pdf
    • http://interbank.link/whirlpool_duet_f6_e2_error_codey1udn.pdf
    • http://getyourscore.info/thoracic_ectopia_cordis_case_reportpuy6e.pdf
    • http://detonic-italy.website/how_to_get_disney_plus_on_lg_tv_2015rdi0i.pdf
    • https://static.s123-cdn-static.com/uploads/4415055/normal_5ffe522d6bb5e.pdf
    • http://bcipreactivaperu.com/home_cinema_media_player_classic_free1ocoi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4270d109-a9f2-4f94-8b41-fc604173aa3b/gotirasadirupotobokovoz.pdf
    • https://s3.amazonaws.com/xisefowu/teamviewer_chip_kostenlos.pdf
    • https://s3.amazonaws.com/roxawo/28209763848.pdf
    • https://uploads.strikinglycdn.com/files/fe4b526f-b13b-43f6-bbfa-16ba738f05b7/who_buys_books_near_me.pdf
    • https://s3.amazonaws.com/muwomapotumugi/57908065545.pdf
    • https://s3.amazonaws.com/xonaxevetaf/wifotiwetiderijemeti.pdf
    • https://s3.amazonaws.com/potofaw/ackley_bridge_series_2_episode_guide.pdf
    • https://uploads.strikinglycdn.com/files/ba9e111a-c59b-411d-8523-2af942c399cb/waforuramavalazizozuguja.pdf
    • https://uploads.strikinglycdn.com/files/d796ccd2-b63b-4b4d-aeb5-848a1fe97764/gabeletidulobu.pdf
    • https://s3.amazonaws.com/nazekisigiduz/kurek.pdf
    • https://s3.amazonaws.com/gowupuzokowuxes/android_studio_3._2._1_32_bit.pdf
    • https://uploads.strikinglycdn.com/files/6de58658-57a8-49f5-98dc-cf19c8c5963c/kugav.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef21.bin
09698ee8f2d472e73e1b3bd5cb767960ef616058c211e08b4c35fbf000342e88		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF21 5532 bytes
font_01_sfnt_off000101e8.bin
7580190562b18810ddbed09857a3f5997c247b48b57dc19acdcf7b6aacebb887		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101E8 10568 bytes

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