Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3c110d78ebdf229…

MALICIOUS

PDF

69.2 KB Created: 2021-01-18 19:30:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 894bbd2b299ebaf36554ec44cd65d96f SHA-1: b920516b4413752700c5f72dc6b428c55f6bba05 SHA-256: f3c110d78ebdf22953e892018c854d52c6a79edb55033178787e6c96144f5b8c
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wb?keyword=retro%20comic%20photo%20maker PDF link annotation
    • https://site-1176454.mozfiles.com/files/1176454/golisegaka.pdfIn PDF document text
    • https://xudepafuvinuk.weebly.com/uploads/1/3/0/9/130969511/nawaravuzowixunig.pdfIn PDF document text
    • https://lomivemaj.weebly.com/uploads/1/3/0/7/130739076/4343825cd37df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375344/normal_5fd20282b217e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421966/normal_5ff25e3c8a76f.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/b0iiVFx/55713165178.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369786/normal_5f8dc072c784f.pdfIn PDF document text
    • https://cdn.sqhk.co/mepetiruzi/xy1BjhH/ben_subway_ultimate_heroes_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/jiajb6E/tubogiluwawitej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476446/normal_5fdb150d5b97f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465691/normal_5fde85e27ef8e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368228/normal_5fefa2f701e84.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/fejakixoweka/99662732926.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/audience_analysis_worksheet_example.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/58431114783.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_off0000d1bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BC 5032 bytes
SHA-256: dbb905328dd207f0d70f07024112df800c50d1db89279305fc668b53a719cba7
font_01_sfnt_off0000e2b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B3 11040 bytes
SHA-256: b966fb72bd1938fc3c1f6d356b7e9b07338a051087b22ff398a3ff44ec6a0302