Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbf557e2a85713fa…

MALICIOUS

PDF

67.1 KB Created: 2021-03-02 16:00:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9cef092d7d22e8f40a0ccb4c090b60ff SHA-1: cae4ef7a2077e3d8e6a2b1794c51c7c5f41a43c2 SHA-256: fbf557e2a85713faa956545353a9c036e918575c03fc2a0dd10b0361b77a0fb3
186 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=blank+climate+graph+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378383/normal_600baae6a126b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453117/normal_5fd86ee5e8a66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482230/normal_603584632bc4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418369/normal_60265143e4ff7.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/BEjhBig/online_business_ideas_uk_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/juvanejejuwo/FMWiahj/hero_new_bike_xtreme_160r_price.pdfIn PDF document text
    • https://voximarabot.weebly.com/uploads/1/3/1/3/131383255/9347591.pdfIn PDF document text
    • https://cdn.sqhk.co/jekunesoru/PV28ieM/vowajefabawedamutake.pdfIn PDF document text
    • http://meriline.store/bedesipivolitolobojuxr2p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427544/normal_5ffcd17fbaa90.pdfIn PDF document text
    • http://4gusevshop.space/railway_reservation_form_format3wy7t.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/wills_eye_near_me3b9ks.pdfIn PDF document text
    • https://cdn.sqhk.co/fabozesemi/cX9icXy/48465646350.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392463/normal_5ff564d5b49d1.pdfIn PDF document text
    • http://nepoxiduvilej.scienceontheweb.net/wusijezi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/guvajobonulara.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_off0000ca49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA49 5552 bytes
SHA-256: 7489ee3d86357ae2a5436d52e6c74e240af8f0d8e7047bfa8cd3081eedf213d3
font_01_sfnt_off0000dd15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD15 9992 bytes
SHA-256: 3d2b3ad0e676b753a1f2fb62cb01432ca81438330403be8655b90da628ea6c6b