Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb78a3cc4b9c13f1…

MALICIOUS

PDF

66.0 KB Created: 2021-02-14 23:20:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c146ed35380170c2ca5d481aa09456f7 SHA-1: 9738dcd7a092cd6ed3a9b31f3531f8b8fa3182a4 SHA-256: eb78a3cc4b9c13f18231a1c40b5d8f3a1147f3938d6d9faa9a4136a418506390
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://baarspo.ru/wix?keyword=dgp+answers+9th+grade PDF link annotation
    • https://dozunetad.weebly.com/uploads/1/3/4/4/134472758/7799218cc8df5.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/Hcjhe6h/82079624446.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446636/normal_5ff2d275a8d7c.pdfIn PDF document text
    • https://wuxudaboxebe.weebly.com/uploads/1/3/5/2/135297242/kisenapojeju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481272/normal_5ff7652acc80c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462035/normal_6021d0c33e6aa.pdfIn PDF document text
    • https://cdn.sqhk.co/sawitofi/dGjd4jb/xutabeso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450907/normal_6028a9b4ad10d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448558/normal_5fe639408f44b.pdfIn PDF document text
    • https://fapusazi.weebly.com/uploads/1/3/4/8/134849501/1455231.pdfIn PDF document text
    • https://cdn.sqhk.co/wirubetena/ji1jehj/notuva.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/Pifjiha/25529156058.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/foneniz/alice_platform_glassdoor.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/physically_based_rendering_pharr.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/energy_equation_solver_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/40144964522.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/gossip_girl_episode_guide_season_4.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_off0000c4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A7 5436 bytes
SHA-256: 496c3cbaed2b5448fb08ec0617f383d6274f7f6e3fa5d4aebbe67684215d3fef
font_01_sfnt_off0000d737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD737 10548 bytes
SHA-256: 83586882778810cd53194faa56c7aa2f3424a9c8eb4d5b611cf849de4ed120d8

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