Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0eabc343554521…

MALICIOUS

PDF

80.0 KB Created: 2021-02-05 15:06:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 529a34668c97e70e5b3d625cb91f08b2 SHA-1: 7c53c7598eddb6c9c92f12768acb0391a841a6e0 SHA-256: 0b0eabc343554521878f37078fb51ba313a5ef75f854b91920506c33b883904a
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://jottigo.ru/wb?keyword=purchase%20decision%20journal%20pdf PDF link annotation
    • http://marketop.club/pagabakarupukativuda4c.pdfIn PDF document text
    • https://jukatuve.weebly.com/uploads/1/3/2/7/132741058/rowaxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417413/normal_600a19eded352.pdfIn PDF document text
    • http://fruittea.space/xixuberukumufisow69km.pdfIn PDF document text
    • http://mmuuue.space/game_recorder_for_xbox_onetu9ts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454043/normal_5fcd384a83835.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459467/normal_600f7541a257d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379219/normal_5ff3f9d35e5c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418972/normal_6007bdeb216a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387816/normal_600def4dea431.pdfIn PDF document text
    • https://sutulozutujak.weebly.com/uploads/1/3/4/8/134884412/folalakufi.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/muvemasoxaji/whistleblowing_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/441724852.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/81451723168.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/93886868077.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_off0000fa3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3B 5320 bytes
SHA-256: dce95028d32d96255821e3e7c4f7acb365918d0022980c184f4cd799fefe65f1
font_01_sfnt_off00010c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C51 12464 bytes
SHA-256: 2887c10c13882ec4b4e27e417253f4d42c1f4fd0fb8a52a77533edc487531a8e