Malicious PDF — malware analysis report

Static analysis result for SHA-256 321b720608d673f8…

MALICIOUS

PDF

76.2 KB Created: 2021-02-25 11:10:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6810edc2086ce58291c09e8ff19b5967 SHA-1: 260e6f71e05139278f34d94b8a5dfbcbd89a8da4 SHA-256: 321b720608d673f846127cdd1c4e900477bc5f24c6b83a989c5c4e833e942999
124 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of external URIs and the overall structure point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8808

Heuristics 4

  • 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
  • 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://bologen.ru/award?keyword=what+is+a+social+studies+elective PDF link annotation
    • https://vejewumuwuwaja.weebly.com/uploads/1/3/4/7/134759129/fewogefexosimipajuza.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/jgCiejh/bee_craft_activities_for_toddlers.pdfIn PDF document text
    • https://cdn.sqhk.co/gegenosuzun/RrBiaFy/80463380851.pdfIn PDF document text
    • http://beliyden.xyz/8487133798052p9b.pdfIn PDF document text
    • http://affilateapp.online/61905858899u5wmo.pdfIn PDF document text
    • https://budovatepita.weebly.com/uploads/1/3/1/3/131398204/nawivigevewisik.pdfIn PDF document text
    • http://portkamesto.site/74348107571w3qov.pdfIn PDF document text
    • http://particulieres-societegenerale.best/42753878832lnkzn.pdfIn PDF document text
    • http://opticsystem.website/diablo_2_runes_ilvls2erb.pdfIn PDF document text
    • http://idealslimitaly-official.site/39128630565ysfic.pdfIn PDF document text
    • https://kuvezuwuziteb.weebly.com/uploads/1/3/4/3/134388010/xonelixekuwupodis.pdfIn PDF document text
    • http://vanlit.ru/product_backlog_user_story_templatedyypw.pdfIn PDF document text
    • http://damvglaz6.xyz/what_is_the_covid_19_in_nigeria92bnj.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/jhghXje/3201236821.pdfIn PDF document text
    • http://gidpopiteru.com/demon_hunter_pvp_guide_skill_cappedvxpcg.pdfIn PDF document text
    • http://wwnews.site/lyskamm_4000_guide_alpineg9u5c.pdfIn PDF document text
    • http://pshcomonhere.xyz/688221384791w20j.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/pakutonetuxisuxebofebiter.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000fe5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5C 5004 bytes
SHA-256: c31ebbd613f0a4ca2eb901559168ce007e1345e982d8b0c40b0c383823c974d0
font_01_sfnt_off00010f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6C 10672 bytes
SHA-256: 35e5ac8e7ff5907a478c9ba85269149fe53785b452e66c26f97a80028f9b6972