Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8a69729c3b28997…

MALICIOUS

PDF

73.1 KB Created: 2021-02-19 12:52:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: af6af891424fde445ae0fb2ce2538250 SHA-1: faff3e781ea307fe8b94f1a1947dff848fe471c7 SHA-256: f8a69729c3b289977b91b4625e781c7201921502b4a7b3659bf581a8490478cd
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/wix?keyword=algonquin+middle+school+algonquin+il PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4444646/normal_5fe51afb32356.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/eicLIE9/tufigekuvakalusos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481695/normal_5fe19dffdf960.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409819/normal_60140666e05a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452863/normal_602eb6c709dc8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462093/normal_5ffea529b14a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484364/normal_6009013e69474.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/idjcUsZ/musica_disco_de_los_80_y_90_descargar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366620/normal_5fec97df2eed4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414159/normal_5fcc37aa43cba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414152/normal_5fd06c2f9d7ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503525/normal_602c54b2398c4.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/hblD6YS/action_movies_list_hollywood_imdb.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/bjgSfha/63058134072.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/suzixegazunow/christ_hospital_information_phone_number.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/3283543341.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7B 5372 bytes
SHA-256: a0420728e5cc98236012677bfd7601c25b4c9d70882fd868f84e9a2d76527cc0
font_01_sfnt_off0000de95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE95 10768 bytes
SHA-256: b4c251c7638e808a7361dead8698c0fbd5d0ee060696e98a6d1549a025e82c99
font_02_sfnt_off0001019d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019D 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd