Malicious PDF — malware analysis report

Static analysis result for SHA-256 a52dc18b47aad8ea…

MALICIOUS

PDF

66.5 KB Created: 2021-02-23 21:23:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ab1fa7529c5f275a52eb96e5fc5f189b SHA-1: 9c55f0aa54da0496bef8f48ac4479cf95b7953e6 SHA-256: a52dc18b47aad8ea497b5e3d96f1cf6730be9f5aa2b9f59a96347a0946f887e9
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and the 'link farm' heuristic strongly indicate an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

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://druttle.ru/strik?utm_term=words+to+describe+someone+stressed+out PDF link annotation
    • http://biggymstoe.com/brother_hl-2170w_printer_cartridge26fu6.pdfIn PDF document text
    • http://dvigatel.guru/wanted_american_film_videoaj1nu.pdfIn PDF document text
    • https://finamiwowekizo.weebly.com/uploads/1/3/2/3/132302732/1154997.pdfIn PDF document text
    • http://uanews.website/knauf_earthwool_100mm_data_sheet8d62j.pdfIn PDF document text
    • http://reawolt.online/xbox_one_gamepad_controllerlewgw.pdfIn PDF document text
    • https://melijavunibujov.weebly.com/uploads/1/3/0/8/130873932/941287.pdfIn PDF document text
    • http://homebig.space/metformin_and_synthroid_for_weight_lossu6819.pdfIn PDF document text
    • https://romuxejis.weebly.com/uploads/1/3/4/8/134887308/32a41b35bd931d7.pdfIn PDF document text
    • http://zoomita.fun/family_tree_design_printableajd10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://laverowe.epizy.com/85945037993.pdfIn PDF document text
    • http://simatan.epizy.com/xusigul.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/sazenutapuvulefor.pdfIn PDF document text
    • http://jubadoloje.epizy.com/backgammon_masters_online_free.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_off0000c917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC917 4996 bytes
SHA-256: 8066d7eb31fa47367496288e5173931e1f6ddd33f68efde1994d131e2a79caa1
font_01_sfnt_off0000da0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0D 10272 bytes
SHA-256: c7a7cc1330df54cca2bb629333866c405563294698073255e73e946a931df879

Open this report in the interactive analyzer, or submit your own file for analysis.