Malicious PDF — malware analysis report

Static analysis result for SHA-256 5086169285a290fe…

MALICIOUS

PDF

76.0 KB Created: 2021-03-29 13:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5cce5fefef274ed4e5821e7fb69fb92d SHA-1: 5b6f1fced8c5d551215bd88aaac6690ac55ec345 SHA-256: 5086169285a290fe5bb0e7bd84c9321e84610bb652043c757416a2d685f69981
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://botokaw.ru/strik?utm_term=mcgraw+hill+workbook+answers+spanish PDF link annotation
    • https://jozevupipe.weebly.com/uploads/1/3/5/3/135346753/3101931.pdfIn PDF document text
    • https://sesadawaroni.weebly.com/uploads/1/3/5/2/135295108/luxoluxutufidateke.pdfIn PDF document text
    • https://vubedupimobu.weebly.com/uploads/1/3/5/3/135314939/4747094.pdfIn PDF document text
    • https://nafuvazufu.weebly.com/uploads/1/3/1/4/131407552/pubexewawem.pdfIn PDF document text
    • https://sozaruterir.weebly.com/uploads/1/3/0/7/130738534/2949407.pdfIn PDF document text
    • https://kibaranelon.weebly.com/uploads/1/3/4/5/134583153/loniwuwerogororuxol.pdfIn PDF document text
    • https://xubidanata.weebly.com/uploads/1/3/4/8/134895671/taziwubowixomif-lobefapakem.pdfIn PDF document text
    • https://gebezemimubitup.weebly.com/uploads/1/3/1/0/131070169/gukedifafine-tadogabogojo-mabobawizu.pdfIn PDF document text
    • https://cdn.sqhk.co/tesigasefaxe/jiOjejc/elemental_dungeon_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/mK4icij/84799580369.pdfIn PDF document text
    • https://fozivumi.weebly.com/uploads/1/3/4/7/134761275/jokigimitux_kebuxufokumalup_tuvikokedaz_zamunu.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CsaOhdD/77800013952.pdfIn PDF document text
    • https://jaxebenub.weebly.com/uploads/1/3/4/2/134266064/3014921.pdfIn PDF document text
    • https://cdn.sqhk.co/dofubetu/gjghghV/milky_way_wallpaper_space_galaxy_universe_2.pdfIn PDF document text
    • https://gulurevipad.weebly.com/uploads/1/3/5/3/135349864/riwafamuburof_jaxejiwoj_nowuwiku.pdfIn PDF document text
    • https://fojaxekixuwid.weebly.com/uploads/1/3/4/7/134743661/zurezedafe.pdfIn PDF document text
    • https://cdn.sqhk.co/totarujined/DA1ghge/bangladeshi_natok_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/jjbSgi7/52566748914.pdfIn PDF document text
    • https://texanajak.weebly.com/uploads/1/3/4/0/134018539/pizapep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE910 5496 bytes
SHA-256: 876f9f7d5aa1bfb9e747e87df01d6789d179c3a9e0a8dd7da8484bdd406d3d6e
font_01_sfnt_off0000fbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD8 11372 bytes
SHA-256: dba53ac31fd7bbd77743ddf26e6e53d93a42dbc797458d39f6bbf028745b106a

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