Malicious PDF — malware analysis report

Static analysis result for SHA-256 98639ef19d80d59a…

MALICIOUS

PDF

63.7 KB Created: 2021-03-01 00:33:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 556f6e20c38ee0b4f9e417fe7294db93 SHA-1: 39d31a541956233703359cfc4c243f686b6a792e SHA-256: 98639ef19d80d59a58bbb830874571d7c95d2dfc79279f9855c8898dfaa4f495
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/award?keyword=10000+reasons+chords+pdf+key+of+g PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415045/normal_6029ea653167c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378155/normal_603162b1d2d32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377095/normal_60292610d18c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414176/normal_5ff87cc8cb311.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/68007723285.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/fojaxexino/tepafavibenexiwiwarogured.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/bokut.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/46387415091.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/1248950533.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/alice_in_wonderland_children_s_book.pdfIn PDF document text
    • http://zisukuvi.atwebpages.com/2020_lexus_es_350_f_sport_lease_deals.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/93732999018.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/xusorotapas.pdfIn PDF document text
    • http://lomuripejo.epizy.com/26876451774.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/balukinu.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_off0000be3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE3C 5652 bytes
SHA-256: fa5d77a76b0d86dc84cac903485bdc778198f144f4adfb13cbde3ae352f0b2f1
font_01_sfnt_off0000d17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17C 9528 bytes
SHA-256: ed30002f5cdf38c672400c023c4efad7330216490f0f726db3473c9d4283a32d