Malicious PDF — malware analysis report

Static analysis result for SHA-256 16f8ed1330166bcb…

MALICIOUS

PDF

71.2 KB Created: 2021-02-13 15:38:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 69b17607ad6f98f6d3bd972affc59463 SHA-1: df7fdc27418417459ee44ecc7051652d17b26182 SHA-256: 16f8ed1330166bcb2ab798a4e66cc4ec514c859e828cdc7ec710d1e1858038ae
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=inorganic+chemistry+solutions+manual+miessler+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370529/normal_5feb96df19013.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/jbgfBV4/flappy_bird_world_record_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/sofizagumup/MQfhjUJ/muqabla_street_dancer_ringtone_download.pdfIn PDF document text
    • http://lnstagram-helps-contact.com/tratamiento_para_acidosis_respiratoriag007f.pdfIn PDF document text
    • http://sweetygirl.club/osteoporosis_australia_calcium0jrse.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416490/normal_5fdd89411f37c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366017/normal_5fe02b89acd2b.pdfIn PDF document text
    • https://cdn.sqhk.co/busibelifiv/jbifwjh/8343842476.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454803/normal_6011f08a9900d.pdfIn PDF document text
    • https://cdn.sqhk.co/lelogusobade/kjhSG0f/thoroughly_in_spanish.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/39956865515.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/xejuzonom.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1F 5488 bytes
SHA-256: 17c30025befc05ddd698d96e5ac766e27252239ce9d9a8978e923511af197162
font_01_sfnt_off0000de9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9E 10288 bytes
SHA-256: c3602cb8510453d7015d664e71f88b4c2db088087d489ed9d89e82b0581c4395
font_02_sfnt_off000101cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CB 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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