Malicious PDF — malware analysis report

Static analysis result for SHA-256 6caf31d69c99327e…

MALICIOUS

PDF

67.8 KB Created: 2021-02-08 07:46:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0f27be6c018d02c7301020d96749ede9 SHA-1: 0ea94e4acaa84a39068fd9838f11c7622f3aaad3 SHA-256: 6caf31d69c99327ed8bc1e148c5cd3aba085577727007dc44cda40f94db17455
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/aws?utm_term=bright+futures+aap+pdf PDF link annotation
    • https://cdn.sqhk.co/daxegajok/nAOjcha/coloring_pages_for_halloween_pumpkins.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391000/normal_60106bb73c0d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375528/normal_5fe256c65e448.pdfIn PDF document text
    • http://fufodew.22web.org/lujesipopamujopizi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467325/normal_600b4b2f0178d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443356/normal_5fcb148c445c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444882/normal_5fddb1dfd88f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447089/normal_5feb628384adb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuxodevidupibe.epizy.com/55017402296.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/92961542686.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/chitralahari_songs_in_sensongs.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/22737034426.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/kenyan_passport_application_form_online.pdfIn PDF document text
    • http://lugaderova.epizy.com/widodotokugalerigapotol.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/fuvorefibepuriref.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_off0000ceb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB3 5320 bytes
SHA-256: 07c3636401ffb2dd15dc083a83205e770f13dde4a71a90009310c8666b1344a2
font_01_sfnt_off0000e0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CC 10112 bytes
SHA-256: c054b304afcd8ed387b9be80c06166420bf7b55d45d0c7ded11da9d1d4ee23dd