Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c7df6eb4e4d77fd…

MALICIOUS

PDF

69.4 KB Created: 2021-02-16 10:31:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 7d7b18356c042f7ecb214bb0e909802d SHA-1: d7b78c79aa7e42b7f23946bb75bca50837ef7427 SHA-256: 1c7df6eb4e4d77fdb8de33eec9a7b43b0bbfbbc9103bdabcdd7853148d33b833
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://maypoin.ru/wb?keyword=taylor%20swift%20false%20god%20lyrics PDF link annotation
    • https://tezifotunojoke.weebly.com/uploads/1/3/0/7/130776805/nizelopexakotubo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470020/normal_601b2f5ceb66f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483851/normal_6006657a1d5f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485714/normal_5fe2599d87b14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422643/normal_5fced980d035e.pdfIn PDF document text
    • https://pinejose.weebly.com/uploads/1/3/4/4/134467182/6672250.pdfIn PDF document text
    • http://naturapple.space/guluwukegavinun9rxz.pdfIn PDF document text
    • https://wepesinojaru.weebly.com/uploads/1/3/2/3/132303052/wibamavalo.pdfIn PDF document text
    • http://tiktokfrance.fun/22160121423ijgb2.pdfIn PDF document text
    • http://help-lnstagramcopyrights-verify.com/tizebelapajawohnvag.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/panalipolifod/google_books_preview_to.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/pabemokoxovafawutuparudoj.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/36678788496.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/wifuxibalut.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/xavowoxuxekekisitujob.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_off0000d2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FD 5332 bytes
SHA-256: c1025a0cd6b04a90f6d6244a430f239e694f6f6e1dbb4ca97d743f679712eb3f
font_01_sfnt_off0000e54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54B 10388 bytes
SHA-256: 80e9ff7c8d1bb4a97a52cc06f6751e2c894f7e3ba8c863cbff41b720185033ac