Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b5a804acb2be4d9…

MALICIOUS

PDF

72.2 KB Created: 2021-01-19 14:45:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 240222d494a1c57cb945114c4d6a777c SHA-1: 6c60b1a76791e8880b3050fafb91ccad39cbf6f9 SHA-256: 4b5a804acb2be4d9e83acb63eb2ef697195e6739862ffe15f2d3d5e56acdf1af
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://jacksth.ru/wb?keyword=classic%20rock%20music%20online%20radio PDF link annotation
    • https://site-1197643.mozfiles.com/files/1197643/94947054202.pdfIn PDF document text
    • https://cdn.sqhk.co/gudopokobipa/cjehbqb/62366723725.pdfIn PDF document text
    • https://site-1168029.mozfiles.com/files/1168029/58849558628.pdfIn PDF document text
    • https://site-1173985.mozfiles.com/files/1173985/dumegogudumirakowononajab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_5f8ed963e1273.pdfIn PDF document text
    • https://site-1172428.mozfiles.com/files/1172428/rosugavanuga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369333/normal_5f90df95d5d39.pdfIn PDF document text
    • https://site-1171987.mozfiles.com/files/1171987/hockey_east_playoffs_tv_schedule.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486035/normal_60039ccfd4fc4.pdfIn PDF document text
    • https://site-1174038.mozfiles.com/files/1174038/frog_jumps_off_bridge.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/nefunupu/kekekafekudinabib.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/73164346574.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/union_budget_2014_highlights.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/63083862939.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/9959370233.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_off0000dced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCED 5052 bytes
SHA-256: cacab4b4fcf8e884a577275fded2404dd92031fcefb00ed396beb6a2d6181423
font_01_sfnt_off0000edfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFE 11508 bytes
SHA-256: 226acd7aecd9b2f8fa4f410b401e3c6d2bc57d667ff68b6a1a7f0f494a4606dd