Malicious PDF — malware analysis report

Static analysis result for SHA-256 764313a1222c821e…

MALICIOUS

PDF

74.3 KB Created: 2021-02-21 14:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 335df78a6742cf7746ce54798ccf2c86 SHA-1: 7f2b17c0c8b3d0bad7ca9e74467f1a4fef7eabb9 SHA-256: 764313a1222c821ea595c8f0690eb4549456e0abdca93cea0ece9f6273780f4f
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://leonvi.ru/wix?keyword=infinity+gauntlet+%25234+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459060/normal_60055d30908d7.pdfIn PDF document text
    • https://silujufadusume.weebly.com/uploads/1/3/1/1/131164496/8639467.pdfIn PDF document text
    • https://lejimawemo.weebly.com/uploads/1/3/0/7/130739028/7442972.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465685/normal_60004f5d513a5.pdfIn PDF document text
    • https://luderokuva.weebly.com/uploads/1/3/5/3/135325165/4784288.pdfIn PDF document text
    • https://nibevomixosu.weebly.com/uploads/1/3/4/1/134108547/0509c.pdfIn PDF document text
    • https://pasorizafam.weebly.com/uploads/1/3/4/0/134096756/8f54c0de5.pdfIn PDF document text
    • https://lidanoliki.weebly.com/uploads/1/3/1/3/131380598/pikiki_meremag_rudaxeso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387036/normal_601fccc52be45.pdfIn PDF document text
    • https://murunabijijot.weebly.com/uploads/1/3/5/4/135401069/ketupokit.pdfIn PDF document text
    • https://tipowunukal.weebly.com/uploads/1/3/4/3/134355136/doxizir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413109/normal_5ff2a0141d38f.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/mosezavor/what_came_before_the_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/conversations_with_my_wife_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/matisiwujobosilixev.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/89978464559.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/rinovivom.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/69176597583.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_off0000e8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B3 4700 bytes
SHA-256: 5bcadb22f5b580c5d041ddf5b4985f66f753dbcfe9fb41be75aa9fb1a91e2665
font_01_sfnt_off0000f8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DB 10428 bytes
SHA-256: 7b4f6d55128887a83000344d95d6443019580db11b08cc320cfe440ae23d2d89

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