Malicious PDF — malware analysis report

Static analysis result for SHA-256 434ed3b6f24f16e4…

MALICIOUS

PDF

66.5 KB Created: 2021-02-12 11:36:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b7202d5f132b2dd01a4992474877ae6d SHA-1: 0694ade2e0d323e3e2544e71c573f9733bfadc00 SHA-256: 434ed3b6f24f16e4da39e043ddbd472377f884e35355febf399d3dbb094aa0f0
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://jacksth.ru/wix?keyword=graphing+radical+functions+worksheet+%25232+answer+key PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388293/normal_5ff144d728680.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387243/normal_5fed16d5efd9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445750/normal_601cbf9d29db1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377905/normal_5fe9ee1360648.pdfIn PDF document text
    • http://fishland.store/patellofemoral_pain_syndrome_manual_therapyo33t8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392220/normal_5ff3148f78689.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466173/normal_6019389ba082c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372376/normal_5fc7d3eccd9f2.pdfIn PDF document text
    • https://xadigepuve.weebly.com/uploads/1/3/1/4/131454317/tomifapomarubarabapa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389606/normal_5ffe8c5baa44b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wetoxisifogif.epizy.com/8734482277.pdfIn PDF document text
    • http://vakutasuv.epizy.com/68556177710.pdfIn PDF document text
    • http://mokineso.epizy.com/address_book_software.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_off0000c8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A0 5604 bytes
SHA-256: 2f9abe6d4bad59c2389813da80d56af8c70a896e3e77bb27ac2611fe827345fe
font_01_sfnt_off0000dbc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC1 9848 bytes
SHA-256: 16358a7420971be25af78064da882a5c63dd9653a0df9dba2986d07f4a5ee2ce