Malicious PDF — malware analysis report

Static analysis result for SHA-256 73129ed5c2d65dc6…

MALICIOUS

PDF

66.0 KB Created: 2021-02-24 17:18:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: be03d1f96bff6956b1ca01ace79bcdf1 SHA-1: 09049a2c4708f4547a0ba6c148f12098b42557f0 SHA-256: 73129ed5c2d65dc62098e76432f412f539851aa294fb70ec466106b731bcb829
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=montgomery+engineering+statistics+5th+edition+solution+manual PDF link annotation
    • https://cdn.sqhk.co/xupebasolaw/1bTick9/torukawutusaj.pdfIn PDF document text
    • https://cdn.sqhk.co/gegenosuzun/Tjfjijj/sejasivaxutulasekiwov.pdfIn PDF document text
    • http://eferevole.com/27256520315lir5b.pdfIn PDF document text
    • http://tdsevsvet.ru/wokuguterovedevixipumuvxtl1v.pdfIn PDF document text
    • https://jetosiwer.weebly.com/uploads/1/3/4/7/134767378/kakudaretudigagegi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393635/normal_5fd1ef854978d.pdfIn PDF document text
    • https://nibuzexo.weebly.com/uploads/1/3/4/7/134720699/jenodaneragaxutipij.pdfIn PDF document text
    • http://digitaloffice24.ru/9819988816111wyf.pdfIn PDF document text
    • https://degiviwab.weebly.com/uploads/1/3/2/6/132680905/0f0f40cbf.pdfIn PDF document text
    • https://xoruvuxana.weebly.com/uploads/1/3/2/6/132696063/kuwumimovovutabo.pdfIn PDF document text
    • http://strita.space/how_to_check_driving_record_mdvr3aw.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/furunumaroxun/12334520880.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/xilepiniwowatafevit.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/reducing_to_lowest_terms_fractions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/osrs_falador_diary_easy_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_off0000c66e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC66E 5584 bytes
SHA-256: 59f71082558b4de9ffb4130a1839843e587f4548fe409587e25145c09484fafa
font_01_sfnt_off0000d958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD958 9736 bytes
SHA-256: bb92cc66b0c59bcafad69eccbfce83f65f105c17c31854532651ce53a71e6548