Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2dedd5848be387c…

MALICIOUS

PDF

70.7 KB Created: 2021-02-15 01:41:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5c74174a84c3ba22e1998103234b0782 SHA-1: 41f6d26695a352efaf3cc9b0f38cdd7c4f1856d4 SHA-256: b2dedd5848be387c230d454561059b63696d36eacd669badc8603a307fcad717
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://bologen.ru/wb?keyword=pictograph%20worksheets%20third%20grade PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367019/normal_5ff0e9115cf23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459479/normal_600dc3aa704b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459776/normal_602299cc4dda2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381528/normal_600b6f16e9c30.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/jujojomojemiz/kipiwuvowuwokekiparu.pdfIn PDF document text
    • http://tiwobera.rf.gd/28139641766.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/repezegubasebebimewaji.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/wabobabixupid.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/uniform_accelerated_motion_worksheet_2._7.pdfIn PDF document text
    • http://judafigot.rf.gd/12647525350.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/vubozudirojopem.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/jibez.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/47347964805.pdfIn PDF document text
    • http://piredesoki.epizy.com/ios_13_beta_1_ipsw_link.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/jezuvetaxuzuna.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_off0000d82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82D 5460 bytes
SHA-256: 8a250165b2dd32887103cc1c6a20d59d9918f502d3e25169846d8758372dd29d
font_01_sfnt_off0000eacc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACC 10420 bytes
SHA-256: 8972516798388689782e97786c0e35b306592f685d3b1c90e7f5478164ce6e3e