Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b064aa49e30f40e…

MALICIOUS

PDF

71.2 KB Created: 2021-02-24 14:54:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 15ba943c791c99e30e0cb72d01c448d2 SHA-1: d25cccaa35c02c71da4524362eb5935da2235bc0 SHA-256: 5b064aa49e30f40e7fe5f71ad943cabff13290ef17067e3065b83d951d11919c
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/award?keyword=dark+souls+4+release+date In PDF document text
    • https://cdn.sqhk.co/fekawitaxug/bijlqha/8_ball_pool_cheats_codes_for_coins_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/tinupolureg/e6geije/gamefly_free_trial_charged_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462986/normal_60184bb6ee80c.pdfIn PDF document text
    • http://ludipusoze.22web.org/why_smoke_alarm_beeps_for_no_reason.pdfIn PDF document text
    • https://cdn.sqhk.co/wifavizen/giyjbbh/az-_900t00_microsoft_azure_fundamentals.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481988/normal_60221a2e797b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497093/normal_600f784524738.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485321/normal_6032d699c6de1.pdfIn PDF document text
    • https://cdn.sqhk.co/lajawawinu/glFVhiu/swather_vs_combine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392439/normal_5fd7ae0b3415d.pdfIn PDF document text
    • https://cdn.sqhk.co/voxobidivel/iBoghxX/98949858010.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/IPic8ha/20529162917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504839/normal_6020a24bdd0db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_601061df474e2.pdfIn PDF document text
    • https://cdn.sqhk.co/fefuxumito/jVFtjhS/top_switch_multiplayer_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459628/normal_5fca7450a2769.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bobiwaj.rf.gd/fawoxawosetadaneb.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/fifipuzolavigane.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/77611656983.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_off0000dc1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1E 4968 bytes
SHA-256: 53fad3826f0887102559416953e054aca6c74a53872460d1174dc1f705c5386a
font_01_sfnt_off0000ed20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED20 10080 bytes
SHA-256: 0df5cdd1712825ade5f11f949f2dab8d8557555d47e61f0f3282e5718257925b

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