Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5bd36ede0fc7d3c…

MALICIOUS

PDF

60.4 KB Created: 2021-01-22 18:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1141aaf8b8d0955f51a2c77ea148cf3d SHA-1: cd4d8cba810036cc09bb9b4566d09d3611183750 SHA-256: c5bd36ede0fc7d3cbfba8856b1659bb49517595abed24972b716b408f3fd50b8
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/aws?utm_term=ctasd+reports%2527+confirmed+refid PDF link annotation
    • https://kujivapepomo.weebly.com/uploads/1/3/4/5/134591142/7585024.pdfIn PDF document text
    • https://deserekinubolid.weebly.com/uploads/1/3/4/3/134319780/3751843.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374522/normal_5feef6eb6be55.pdfIn PDF document text
    • https://xokefinodoju.weebly.com/uploads/1/3/5/3/135316617/4711720.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366015/normal_5ff3eca39458f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369491/normal_5ffb0525bdf97.pdfIn PDF document text
    • https://degugelusejife.weebly.com/uploads/1/3/2/6/132695568/9547279.pdfIn PDF document text
    • http://derewopenila.22web.org/vuroborasolituju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412896/normal_5fe5108dca4d0.pdfIn PDF document text
    • https://site-1168401.mozfiles.com/files/1168401/12010849483.pdfIn PDF document text
    • https://wakaxizuso.weebly.com/uploads/1/3/5/3/135322555/lafotupakefe.pdfIn PDF document text
    • https://site-1178850.mozfiles.com/files/1178850/e_wallet_meaning.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fiwemigusa.rf.gd/android_studio_recyclerview_inside_scrollview.pdfIn PDF document text
    • http://gozudivigel.epizy.com/moradezipavoloxodufog.pdfIn PDF document text
    • http://zadizufosa.rf.gd/airman_pds175s_air_compressor_manual.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_off0000b042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB042 5208 bytes
SHA-256: e6b6d21771721951aa23d46eeae9dd71143a60f31412c0f162b00dcaff00b685
font_01_sfnt_off0000c1eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1EB 10172 bytes
SHA-256: 4b1165456039303fe34f91c7cc0f2ca6fa5f55b09a31bb183326fc60c71d7611