Malicious PDF — malware analysis report

Static analysis result for SHA-256 c264ee5c97ea2f46…

MALICIOUS

PDF

66.8 KB Created: 2021-02-09 04:42:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2cbc1d1dec34c75c01bd9af156f6c8ef SHA-1: 0871c3db777ca053f887028f1f726aec038fc7bd SHA-256: c264ee5c97ea2f469fa359f3120a2d414c205c6905ca6986b72cf3312705135e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to link farms hosted on disposable domains, suggesting a phishing or scam campaign. The presence of external URIs and the link farm heuristic strongly suggest the document's purpose is to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://leonvi.ru/aws?utm_term=character+worksheets+1st+grade PDF link annotation
    • https://gisijenoxumo.weebly.com/uploads/1/3/1/4/131437849/perutukanemera-dezide.pdfIn PDF document text
    • http://thrivewebs.com/jim_sheedy_needlen2x6z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423780/normal_5feba1ff6e99a.pdfIn PDF document text
    • https://tasiwusod.weebly.com/uploads/1/3/5/3/135351817/tezujobejademizunom.pdfIn PDF document text
    • http://private-channel.site/73718381171lpgc1.pdfIn PDF document text
    • http://ryursew.space/wabivanotawetaxezajojud8qmtk.pdfIn PDF document text
    • http://cpatrump.com/bosagepuriguxush547v.pdfIn PDF document text
    • https://saxonolofazejel.weebly.com/uploads/1/3/2/6/132681209/pobasa.pdfIn PDF document text
    • http://potenciy.xyz/nosupolojoxixegimoda1wfpb.pdfIn PDF document text
    • https://gadolelexuzited.weebly.com/uploads/1/3/4/4/134486477/rutedokow-nalakiw-zujoxorilijal-jawipe.pdfIn PDF document text
    • http://hookup753.fun/white_pomeranian_teacup_for_salewhh9m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484834/normal_5fd1ef0802dc0.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/tomamujuf/bhojpuri_video_hd_ing_naya_gana.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/agogo_eewo_video.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/google_spreadsheet_javascript_api_example.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_off0000c997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC997 5280 bytes
SHA-256: 1aea799e6feaae07f8ef877a1e2d6d287ee6579ecc0e389e28955845deacbe3f
font_01_sfnt_off0000db95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB95 10116 bytes
SHA-256: 9b610c123996e38829d5d458547346c203e91bf928deae3c39e2ee94b5f9a01d

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