Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a59f5e2d3de4f4d…

MALICIOUS

PDF

64.6 KB Created: 2021-03-10 06:57:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 4d4da2830ef8f4622565ad8fa494dc4c SHA-1: 713c9f148c9a5f39b18632bc16b8d229a9713fab SHA-256: 9a59f5e2d3de4f4dff3955600895b35470d282128adada6bb6bf2e85bed3773a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful sites.

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://mezovuduw.ru/aws?utm_term=new+holland+ls170+quick+attach+parts PDF link annotation
    • http://lnstagram-verificationbadgeform.com/inner_sea_world_guide_reviewpk795.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394060/normal_6003556788d09.pdfIn PDF document text
    • http://watercart.ru/66571025961ca2ez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379974/normal_60062dd2be886.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375887/normal_600fbd24853b1.pdfIn PDF document text
    • http://vixegoxufareka.getenjoyment.net/ps3_emulator_pc_metal_gear_solid_4.pdfIn PDF document text
    • http://devlp.design/stalker_2_police_radar_gun_manualnybqy.pdfIn PDF document text
    • http://pakimudemezir.iblogger.org/shinee_kpop_songs.pdfIn PDF document text
    • http://megahit.space/cards_against_humanity_rules_who_goes_firstnlpwc.pdfIn PDF document text
    • http://gatowixipeba.mywebcommunity.org/art_models_5_free_download.pdfIn PDF document text
    • http://helpforteam.com/fuxezukotogowavazikq5ml.pdfIn PDF document text
    • http://itsamorem.com/zenodufuna5iyt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tivakifuzir.atwebpages.com/sidememajabase.pdfIn PDF document text
    • http://mivesopogidibe.epizy.com/13185217548.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/gawimata.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/46553304037.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/nike_junior_football_gloves_size_guide.pdfIn PDF document text
    • http://pifetipopazemex.rf.gd/88676083569.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/colocar_prefixo_automatico_android.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_off0000bf96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF96 5688 bytes
SHA-256: 4e36b408ec9e1137dec64e4f1035e2bd410f22f1ea3577497e12bf442fd26d17
font_01_sfnt_off0000d30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30C 10048 bytes
SHA-256: 1d4ac9bfbb787af145f9e0ec850a1004faeddede913104897d15d2016e00be19

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