Malicious PDF — malware analysis report

Static analysis result for SHA-256 99f7a4b6ffc447ea…

MALICIOUS

PDF

70.6 KB Created: 2021-02-10 13:50:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 526a28e210cae8cede0bf98e15192d40 SHA-1: a09f35bbe8a1012762c98381f7d8e2986c32047b SHA-256: 99f7a4b6ffc447ea61b132f1d33c7d1b3b4c04a6d3d0faeaae856786ff814b5f
194 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=game%20dev%20tycoon%202%20%20pc In PDF document text
    • https://cdn.sqhk.co/gotakavapu/izdhihe/fejudoxamuxor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445130/normal_601806a5f3ffb.pdfIn PDF document text
    • https://cdn.sqhk.co/vefoveted/djhhigi/83538403504.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374708/normal_5fe4365c3eb19.pdfIn PDF document text
    • https://cdn.sqhk.co/musutalivun/ji0cide/ninufu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444649/normal_5fd6449d168e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490936/normal_601efb1421228.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474471/normal_6010fcd8ae8ec.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/cc1vghW/polyjuice_potion_punch_recipe.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/hbq1jcX/suvewezeziburo.pdfIn PDF document text
    • https://cdn.sqhk.co/dediwifime/XqOI889/zaxemupomugu.pdfIn PDF document text
    • http://ita-talia.fun/balbharti_marathi_book_1996lv0s7.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/lopadivupudexa/sikejebafutomowe.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/chambal_ki_kasam_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/vietnamese_iptv_apk_app.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_off0000d8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C0 5240 bytes
SHA-256: 0208b532f896fdbc88d8f12d4afcc0aa1a34c8b596b6a9fb104eb3c8622e5df9
font_01_sfnt_off0000ea99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA99 10360 bytes
SHA-256: a1341deb1b62ccdf3be1f574c5548b8ed6f17ce119d8696f09975319f3470e99