Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf59e46ae9c59e9…

MALICIOUS

PDF

72.5 KB Created: 2021-02-12 02:41:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: aeb74744864a7cc06159a45ee178a23f SHA-1: 2551fc0de1a7dd9df3eceb71e89b5e5e3560c9db SHA-256: 8bf59e46ae9c59e9e01cc048ec56a62d6eb70a756212c094696792cd71393716
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=psychsim+5+not+my+type+answers In PDF document text
    • https://wafiludelo.weebly.com/uploads/1/3/1/4/131437380/rovuzotesuxamazawuz.pdfIn PDF document text
    • https://nobaletakalesig.weebly.com/uploads/1/3/2/3/132302751/bogigukaku_kasilenapi.pdfIn PDF document text
    • https://degebemug.weebly.com/uploads/1/3/0/8/130814630/wazege.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/obidkic/applock_fingerprint_pro_apk_revdl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402503/normal_5fe12c323f0a1.pdfIn PDF document text
    • http://manybigs.space/99033177743futuj.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/fj2Ojal/mint_launcher_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kixeworu/jhQgfiI/77239994545.pdfIn PDF document text
    • http://b4shop.icu/37429544637iai7.pdfIn PDF document text
    • https://wopuxikejixup.weebly.com/uploads/1/3/1/8/131856699/8707059.pdfIn PDF document text
    • https://nuzoligul.weebly.com/uploads/1/3/3/9/133997434/b6b245cc45fe73a.pdfIn PDF document text
    • http://trelon.fun/widih_tv_koreacrp48.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/baxunaf/69768334694.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/pekise.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC7A 5460 bytes
SHA-256: f28ea8b8a74144c234d000a7b6920b576306ab7a29bfc1558d22d3db152a4fa1
font_01_sfnt_off0000cef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF4 2736 bytes
SHA-256: 80193927e68c3a5c6f16be03855951d61aed9c628ec75f20b14974df2051825c
font_02_sfnt_off0000daac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAC 10368 bytes
SHA-256: 11bb21c05e5e7fd01073df911a636f84cb6851e7ec1dab047a11c9a4b0296b8d
font_03_sfnt_off0000fe1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1F 16080 bytes
SHA-256: bf2bb651642035a19e1b8bf5dc55c4db7948913289cd11d1f66f0c65c0fed8c7

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