Malicious PDF — malware analysis report

Static analysis result for SHA-256 74903658566029ee…

MALICIOUS

PDF

72.2 KB Created: 2021-02-05 18:50:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 431d59246aef5c85f29b3d09777bec02 SHA-1: d9943be192a01c44e76750b1a0f935c31bb02d5b SHA-256: 74903658566029ee1820238c2eb3d6ed007ec44c3a0aedd30bb54c200a0b9bc8
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/wb?keyword=sfx%20school%20liverpool%20ofsted%20report PDF link annotation
    • https://cdn.sqhk.co/pobumepova/rujdcvw/60868439378.pdfIn PDF document text
    • https://cdn.sqhk.co/tumexifukevu/ajc4fIA/xunamowenodig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484143/normal_6011c5e7b0901.pdfIn PDF document text
    • https://cdn.sqhk.co/nilamemiw/pBhghNx/nupabefavevuned.pdfIn PDF document text
    • https://cdn.sqhk.co/nujekezitifi/hfjg1Pz/81294699624.pdfIn PDF document text
    • https://giruwaferelesed.weebly.com/uploads/1/3/4/8/134850821/810428.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473388/normal_601b6699a7e00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410695/normal_5fc7c27aede0a.pdfIn PDF document text
    • https://dataremidesop.weebly.com/uploads/1/3/4/6/134697992/funidelavi.pdfIn PDF document text
    • https://cdn.sqhk.co/siwemawatu/icTcsHC/lobbyist_salary_new_york.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/minegikukovel/free_vector_silhouette_basketball_player.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/53383679156.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/accident_incident_report_form_qld.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/feluvabumo.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/chirunavvutho_movie_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/sutorev.pdfIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/ikea_double_bed_sheet_set.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/runuguj.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_off0000da95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA95 5264 bytes
SHA-256: ae7ff3440e86283163c9bc7a9fb7eb2b0626f78fc414b9c8259430c2c1e729d5
font_01_sfnt_off0000ec90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC90 11440 bytes
SHA-256: eb2760f5be7b14e7526825e2d59e2ce983b02fce609a18f934ff47a138496aa1

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