Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b8bc5a8cb431da…

MALICIOUS

PDF

67.9 KB Created: 2021-02-15 09:43:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 91b6a5db1a99d3056e39898a41f50b22 SHA-1: 2dd233e2891b7f6e24c4c55bf66cc6e3736423d9 SHA-256: 32b8bc5a8cb431dadcb81ee0123c19c52b9bafcc54b44fd7b2a86de93bc23013
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://druttle.ru/wix?keyword=words+that+starts+with+h+to+describe+someone PDF link annotation
    • https://vikalixasu.weebly.com/uploads/1/3/4/6/134631782/e3c2e5ae8c300.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417675/normal_5fcb0a99e58bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417824/normal_6027fb55a91cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421210/normal_5fe671d17eb42.pdfIn PDF document text
    • http://dadefuxafovub.22web.org/13582118430.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418583/normal_60163c43d07fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474446/normal_5ffcf27ddd0a6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lironif.epizy.com/55991566181.pdfIn PDF document text
    • http://nijunopuk.rf.gd/finger_type_slug_catcher_design.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/febel.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/simple_java_projects_for_beginners_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/whatsapp_messenger_apk_tablet.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/277627341.pdfIn PDF document text
    • http://lobulowigewimu.epizy.com/welol.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_off0000cc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC93 5392 bytes
SHA-256: 274752822e0343eb6c60d8289d22436e30885c234d2f86ef9c3a4909dbc42382
font_01_sfnt_off0000ded3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED3 10528 bytes
SHA-256: d0e7b14e07fe172e5875b53f306c1aed613753ad38eebf1aba523dc4d118067c