Malicious PDF — malware analysis report

Static analysis result for SHA-256 e83a96a8111e1dbd…

MALICIOUS

PDF

64.1 KB Created: 2021-02-15 05:02:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 56ae3c4dec66a1a6701d4e0aea26e6e3 SHA-1: 3f789aa64153d895e91b87bb664dd1627d3da7a9 SHA-256: e83a96a8111e1dbdc18ef4a06e881f46d7654af14d2a233db6501227dc63bc5a
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://jottigo.ru/aws?utm_term=atys+6e+pdf PDF link annotation
    • https://cdn.sqhk.co/dijogiper/hcOjcha/color_cube_puzzle_solution.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/e6daK3S/genius_shooter_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386333/normal_6021edee65904.pdfIn PDF document text
    • https://cdn.sqhk.co/disonixures/jghjibw/29188477423.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418984/normal_5fd635be241c7.pdfIn PDF document text
    • https://cdn.sqhk.co/zutijujes/jjsjcid/addams_family_gold_pinball_price.pdfIn PDF document text
    • https://jodegometokak.weebly.com/uploads/1/3/1/6/131606115/5270287.pdfIn PDF document text
    • https://cdn.sqhk.co/jimikafede/jcKfEgj/classic_rock_and_roll_radio_stations_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406170/normal_5fe9ffff585ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_601e123bad4e1.pdfIn PDF document text
    • https://cdn.sqhk.co/jibenapola/riachiB/full_screen_sad_whatsapp_status_video_download_mp4.pdfIn PDF document text
    • https://cdn.sqhk.co/laruxibut/ddejgib/rome_total_war_barbarian_invasion_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/hhhGh5I/74136123884.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/zafirawit/82380981024.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/55606438782.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_off0000c1fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1FE 4944 bytes
SHA-256: eb8750a87afa37f15da721d6a4054fa0858c199b18f753fa5ffd1684af702977
font_01_sfnt_off0000d2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FB 9668 bytes
SHA-256: 629d74bc54dbd74ae0ad383a853727ca5c318580cdb06d057b477a260f15019a