Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdad8084097d7b02…

MALICIOUS

PDF

72.4 KB Created: 2021-02-28 05:20:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8be3caced65b712773dd4e9f0e15db1b SHA-1: 9e8d9dbb3e3d4ad6e986d9d80a0b09fffdf03bee SHA-256: cdad8084097d7b0235b10a762856b11a604608150330d463c4499cc31a62391b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/123?utm_term=can+i+start+my+pressure+washer+without+water PDF link annotation
    • http://look-hotel.com/accounting_principles_9th_edition_solutionshpsnm.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/ijifha8/sefoj.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/hfiefMS/malakorowokowujawisijej.pdfIn PDF document text
    • https://cdn.sqhk.co/murafabu/ai5Ihe5/28036782338.pdfIn PDF document text
    • http://ketosimple.online/showbox_android_apk_latest_versionsq5si.pdfIn PDF document text
    • http://13millions.store/best_resume_format_for_freshers_download46tr9.pdfIn PDF document text
    • https://cdn.sqhk.co/rokajoten/Wgdjhij/xewer.pdfIn PDF document text
    • https://dasezakam.weebly.com/uploads/1/3/4/8/134883145/guxozorix.pdfIn PDF document text
    • https://cdn.sqhk.co/gemesikexo/a8RhhJW/futofojox.pdfIn PDF document text
    • https://cdn.sqhk.co/velizovatim/jmWVhia/85936216822.pdfIn PDF document text
    • https://cdn.sqhk.co/kugorazig/z7ggbCJ/best_unlimited_free_vpn_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/kejofuvata/dSPAjfr/rexazitadipujorakorijutox.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/frLu0ij/planets_in_the_solar_system_smallest_to_largest.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/zuguvoxoki/hallelujah_piano_sheet_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/rockstar_gta_v_report.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_off0000def5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF5 5124 bytes
SHA-256: 9379852a5be042d8f8aa6b47dd408941bfc1aaea67a26542eef555eb4c755ecb
font_01_sfnt_off0000f048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF048 10852 bytes
SHA-256: 3aa386bd48babea547ffdbb138e9ac705f087887a2f4cb5a58af00203467aacc