Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bc94d918461fe42…

MALICIOUS

PDF

78.5 KB Created: 2021-04-19 23:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 459c2c52b145c6fa30eed77e016378a8 SHA-1: 26801211b3edb717c973ad7ea52ea82d1c5bee3e SHA-256: 3bc94d918461fe427d7a709537027d5b9f726f2b4cd5df5fa7132a0c74a64072
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 hosting or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/strik?utm_term=what+does+sxt+plus+mean+on+a+dodge+charger PDF link annotation
    • http://botarim.22web.org/60208089801.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/Fqieiab/switch_pro_9100_install.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/biology_lab_report_format_example.pdfIn PDF document text
    • https://cdn.sqhk.co/sulojumi/dQidggN/kopajitopibet.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/yUjhOie/kidafodalatariforinoporeb.pdfIn PDF document text
    • http://jipolavex.medianewsonline.com/vavusu.pdfIn PDF document text
    • https://lotefexikig.weebly.com/uploads/1/3/4/0/134097130/9998178.pdfIn PDF document text
    • http://dommasters.site/dilowuropiypaqx.pdfIn PDF document text
    • http://xtina.online/what_kind_of_anesthesia_is_used_for_thyroid_surgery84gkt.pdfIn PDF document text
    • https://lekofubazag.weebly.com/uploads/1/3/1/8/131872104/riroxemuxadagej_ruriropodu_vawipuzopufara.pdfIn PDF document text
    • http://samafutanub.mypressonline.com/vasodatilol.pdfIn PDF document text
    • https://cdn.sqhk.co/bemoranoz/ggJiiig/94728823487.pdfIn PDF document text
    • http://bionatur.space/zorich_mathematical_analysis_solutionsimdd2.pdfIn PDF document text
    • http://prizinsta.info/what_is_an_example_of_a_narrativei2p4t.pdfIn PDF document text
    • https://rodazikajoreme.weebly.com/uploads/1/3/0/8/130874285/1523370.pdfIn PDF document text
    • https://todatotosikuped.weebly.com/uploads/1/3/0/7/130740429/599321.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wujijewukexewo.rf.gd/qumica_orgnica_formulacin_online.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/70573537482.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/38966181982.pdfIn PDF document text
    • http://namezenidel.onlinewebshop.net/al_arabiyyah_bayna_yadayk_1.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/33081008548.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/android_floating_action_button_set_size.pdfIn PDF document text
    • http://segimoto.myartsonline.com/91168761629.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_off0000f366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF366 5568 bytes
SHA-256: 43a2ec7314b41e53507196f658402a6918dc241b7c4f33ae8244f539217cac96
font_01_sfnt_off0001063c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063C 10640 bytes
SHA-256: 9192eb394fd7d229603fd2eaedc16b4edd5236f7474075927de9d5dd94305f24

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