Malicious PDF — malware analysis report

Static analysis result for SHA-256 a58c21520038e534…

MALICIOUS

PDF

71.4 KB Created: 2021-02-12 15:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d7c2ee3827a16b702cb8eec0e8348e98 SHA-1: 7c4e931dbe617069d3cf2774505f188638b11d65 SHA-256: a58c21520038e534137a8c8e59890546ee768f62abb1711474b19a77631bc8c6
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=electronegativity+worksheet+questions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4427793/normal_5fceae5a3451a.pdfIn PDF document text
    • http://girlita.space/visoj1umu2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498345/normal_60236c99e5a38.pdfIn PDF document text
    • https://cdn.sqhk.co/jovakuki/haibfyS/t-_mobile_tech_experience_app.pdfIn PDF document text
    • https://cdn.sqhk.co/sofizagumup/ukichdm/dipaj.pdfIn PDF document text
    • http://opsnatur.fun/20089802594czik5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486200/normal_5fc67dc722d5b.pdfIn PDF document text
    • http://alkostore.xyz/bogelapadexevatagoaitim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tipakixulo.rf.gd/adobe_photoshop_2018_filehippo.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/1623303232.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/nolapisetesavazotevole.pdfIn PDF document text
    • http://puwiliguso.rf.gd/unilorin_jamb_admission_list.pdfIn PDF document text
    • http://kodasakame.rf.gd/tugezomed.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/98165955943.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/crocs_clogs_size_guide.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_off0000da11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA11 5464 bytes
SHA-256: 5741fdc9eebf04380898ceadd109b6f00d7b73539e0aae7450c3799b8f0a85bd
font_01_sfnt_off0000ecc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC3 10456 bytes
SHA-256: dd265d3b11d30934fc1ccdf2b7ff3614a1e1ecae538b301750490e1b9f32fb70