Malicious PDF — malware analysis report

Static analysis result for SHA-256 41eff71fb39fab64…

MALICIOUS

PDF

64.1 KB Created: 2021-02-08 20:00:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: cae63fe1e7227a5541ea1c79e971055f SHA-1: 5942fc38c68459264cf525d1ad62d8e2e8077419 SHA-256: 41eff71fb39fab64ce2e79a8d6e13c1ee520e66ea8a43fa1efc1e8bd6295a33d
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://druttle.ru/wb?keyword=blank%20space%20lyrics%20video%20mp4 PDF link annotation
    • http://siankaanmexico.com/scratch_3._0_tutorialk53wu.pdfIn PDF document text
    • https://cdn.sqhk.co/guzamuvi/jhhagc2/meligedekezulodibono.pdfIn PDF document text
    • https://cdn.sqhk.co/peluxisomex/agjMQVT/nolumenuxuwuzoxiwi.pdfIn PDF document text
    • https://cdn.sqhk.co/tokititagiwe/jfhcie8/77266080915.pdfIn PDF document text
    • http://ig-objectionform.com/korg_poly_61_manualed4mr.pdfIn PDF document text
    • https://cdn.sqhk.co/libodinidep/jbhgmPf/underhand_barbell_row_vs_overhand.pdfIn PDF document text
    • http://hyipinvest.site/transportation_math_worksheets_for_preschoolersh4447.pdfIn PDF document text
    • https://cdn.sqhk.co/xesozugis/k6hfk8c/flip_or_flop_new_season_trailer.pdfIn PDF document text
    • http://mybiol.site/73244897346vjk0c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pafexegud/lagezixamewanobizaxafar.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/60247659309.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/pabuwonirokisazigo.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/pentagon_humph_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/arteriovenous_malformation_mouth.pdfIn PDF document text
    • http://nixuverojezuluz.epizy.com/12025901487.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_off0000bf31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF31 5584 bytes
SHA-256: fd42b12489ccbaae18b753f7e69218180d62a9d03513c6a906c7efd9103bf58b
font_01_sfnt_off0000d22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22D 9820 bytes
SHA-256: fbc88d3c682a025698bc72068edd448aa1de178e465284b4c399c5dee3f13e23