Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa4211159241c64…

MALICIOUS

PDF

76.7 KB Created: 2021-02-02 10:46:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a95850ca02b26bf0b7418748d7928924 SHA-1: 833faa8b63a19977d252d29de8d964d7b4ceda7d SHA-256: 0fa4211159241c6429d544dfff00df446e43e405eefe32bbf7988575437c2714
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wb?keyword=fish%20tanks%20for%20sale%20ebay PDF link annotation
    • http://private-channel.site/naruto_opening_7_roblox_id47aa6.pdfIn PDF document text
    • https://fiferogupinuwa.weebly.com/uploads/1/3/5/3/135306016/woboxilirono.pdfIn PDF document text
    • https://cdn.sqhk.co/sufadoma/Qhi5iiA/11556174576.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444369/normal_5ff01ba12c0da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486200/normal_6012e1f69269e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_5fd66e5e671fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417226/normal_5fec2303dc229.pdfIn PDF document text
    • http://lnstagram-verifedbadge.com/cmaa_70_2010uz8lv.pdfIn PDF document text
    • http://limons.space/94248442570u38f1.pdfIn PDF document text
    • http://jsexj.fun/wegufozuper3dh5t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490265/normal_5ffefb688c1b2.pdfIn PDF document text
    • http://bluebadgeform.com/mcgraw_hill_wonders_4th_gradeeud0u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529893/normal_5fe17c425ae2d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zobatokuvanoz.epizy.com/namokese.pdfIn PDF document text
    • http://wuxipuretox.rf.gd/6071737175.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_off0000ee43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE43 5116 bytes
SHA-256: 5aa6cb6d907ca95a5c2d23de1b53d6240e5473c475612698b2b4cb910eb07d9b
font_01_sfnt_off0000ffb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB2 11252 bytes
SHA-256: 17944fd77a21632e257294970b83d893e83d1c1e161ed7e45370898a87db5c2c