Malicious PDF — malware analysis report

Static analysis result for SHA-256 e59bd970299dde17…

MALICIOUS

PDF

72.2 KB Created: 2021-03-26 07:44:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5e4d1dba40edaee3a63afe73e24ad65b SHA-1: cef6b06dfbaa56dcbb05dca5f71439f2242516fc SHA-256: e59bd970299dde172d1a6499aa91d4472f9bf375c9925753e9af59aa6293cf16
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many pointing to disposable domains or Weebly subdomains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to malicious or spam content.

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://maypoin.ru/123?utm_term=administration+or+administrative+information PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482415/normal_60279d24646de.pdfIn PDF document text
    • http://bigpleasure.ru/what_is_iso_iec_27001_lead_implementeruyrjt.pdfIn PDF document text
    • https://matazesugol.weebly.com/uploads/1/3/4/7/134702103/2277964.pdfIn PDF document text
    • https://ruwatija.weebly.com/uploads/1/3/4/8/134846771/bidugikagowivuweje.pdfIn PDF document text
    • https://kasikijafeke.weebly.com/uploads/1/3/1/4/131406722/tonukifudumel-tujoxov-dojexi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469634/normal_605b3357e8f91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387567/normal_604209913b482.pdfIn PDF document text
    • http://oneitstore.pro/alesis_hd24_fireport_software_downloadg29ln.pdfIn PDF document text
    • https://bimevaxufozuz.weebly.com/uploads/1/3/2/6/132683359/luwuvabufujuw-tirug-firinik.pdfIn PDF document text
    • https://pirodiditabun.weebly.com/uploads/1/3/0/9/130969169/fabin-zuzaf.pdfIn PDF document text
    • https://jojobejuw.weebly.com/uploads/1/3/2/8/132815094/292195385b.pdfIn PDF document text
    • http://beautysss.site/99478994061a2jgu.pdfIn PDF document text
    • https://wefapewirevuvik.weebly.com/uploads/1/3/4/6/134667644/6157defb.pdfIn PDF document text
    • https://bumobuzeki.weebly.com/uploads/1/3/4/4/134477779/068597.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/jodabiladezot/nezavamuzativipufigu.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/craftsman_shop_vac_hose_adapter.pdfIn PDF document text
    • http://raxajabidadida.onlinewebshop.net/kadusexevukofela.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/how_to_clean_a_t-fal_compact_deep_fryer.pdfIn PDF document text
    • http://wejajesenopezoj.onlinewebshop.net/what_is_coding_in_ict.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/dehumidifier_not_collecting_water_uk.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_off0000db41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB41 5068 bytes
SHA-256: 6feaca4f5e4e95f4061ae46d35c7a5bac7f01479e8658fb60a681f1dde0923ac
font_01_sfnt_off0000ec6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6F 10928 bytes
SHA-256: 2c8f6eb7f2f62fa3e86bda9f6b54b85133b42a3fb7616efd7bd4f16e3a1d7c9f

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