Malicious PDF — malware analysis report

Static analysis result for SHA-256 c111c1f06f68d8a7…

MALICIOUS

PDF

80.7 KB Created: 2021-03-13 19:57:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3765a9c1c362c78575af7dc54c766045 SHA-1: 13ac90ecec7cc3b52ecd1f17eb9d45612819336e SHA-256: c111c1f06f68d8a73e1c3e7ffe78280dfe994c08c96c493c4d395b057bb8d015
136 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://midufefew.ru/award?keyword=arteriografia+coronaria+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457849/normal_6030ed618b96c.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/EAtid47/coupons_for_wish_promo_codes_that_work.pdfIn PDF document text
    • https://cdn.sqhk.co/gutemokerezo/jgdh6ux/best_anime_alarm_clock_app.pdfIn PDF document text
    • https://cdn.sqhk.co/kataregulu/O4bCAhf/71092522419.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/igdKpuG/super_tank_mini_mesh_coil.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/jcjiDe4/nisepija.pdfIn PDF document text
    • https://cdn.sqhk.co/nakizenonetu/jgig9hb/povavogefizepedutere.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497658/normal_60308702a3360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412762/normal_5fdc5886666c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501794/normal_604b480d1d553.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392215/normal_602711c6a8f3b.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/jfzicgj/kijuwis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413713/normal_60040ea31db76.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae88bcc9-a2df-4c19-91cf-4a23aa2e039d/short_stories_with_moral_values_in_english_for_adults.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/089f5cec-d28c-40d7-b191-6c1b2e4b0418/sharp_aquos_flashing_power_button.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/245c67ce-fd92-4da8-aced-b4aa85ee4727/rezenurubalezanogutefil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d761a2e8-b7c6-4536-a18d-759fba1cde82/bose_awrcc1_remote_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee7bbb40-a95b-4f0e-9b50-f73edfc86b9a/omron_blood_pressure_monitor_hem-432cn2.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_off0000faaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAF 5100 bytes
SHA-256: edb0a5213dcebba4e24e95f4897aa68e570b5ea904d540e517298981840f8220
font_01_sfnt_off00010c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C22 12228 bytes
SHA-256: daf1ad8757d95c3c9c8fb82e293b45cc1eac37367100a9f61cb6ec16496e4cc8

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