Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ebc3b7fb3792f5b…

MALICIOUS

PDF

75.6 KB Created: 2021-02-14 17:32:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0e978921f4c74fa378a00fdd5a0df81a SHA-1: 290443a76a121b014ee960ea1c34493280ae54e1 SHA-256: 8ebc3b7fb3792f5b87864cb5f4094511ce91d713f89f46b5000377863fc14641
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with many pointing to disposable domains and exhibiting characteristics of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to malicious 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://jacksth.ru/123?utm_term=slime+chunk+farm PDF link annotation
    • http://frasqen.online/58063227353llzcn.pdfIn PDF document text
    • http://outputqwvk.space/50590076569ygh72.pdfIn PDF document text
    • http://dekabizutetan.22web.org/android_emulator_for_android_studio.pdfIn PDF document text
    • http://prostosite.site/womevuxalababamibitgfhjv.pdfIn PDF document text
    • http://gabutetidik.22web.org/good_food_guide_awards_2020_brisbane.pdfIn PDF document text
    • http://trendmobile.ru/brave_frontier_2_trial_4_guidee2r40.pdfIn PDF document text
    • http://wirelessinfo.ru/89148268879l8b78.pdfIn PDF document text
    • http://usersdeviceprotectionservice.site/66429693640098gm.pdfIn PDF document text
    • http://gsmall.space/xasufevepanadcz1x.pdfIn PDF document text
    • http://veronaital.space/bozewireriterekajxqlsx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mowigefugitixa.epizy.com/devexpress_report_datasource_runtime.pdfIn PDF document text
    • http://nekofixas.rf.gd/happy_birthday_song_in_tamilanda.pdfIn PDF document text
    • http://notalopelovawu.epizy.com/60341183157.pdfIn PDF document text
    • http://pevudavef.rf.gd/apex_launcher_app_3._3._3_apk.pdfIn PDF document text
    • http://gogewarixisude.epizy.com/spectre_performance_air_intake_system_reviews.pdfIn PDF document text
    • http://jazupizewatabal.epizy.com/national_geographic_magazine_august_2018.pdfIn PDF document text
    • http://tamazodatitemi.epizy.com/22555851159.pdfIn PDF document text
    • http://demezokesude.rf.gd/barapokatodosonolovunusi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE8 4800 bytes
SHA-256: 52429beb21eb7ad6a01144efc8bcd0e7394ef9af20cc541c6a427c773f7638dd
font_01_sfnt_off0000f001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF001 10364 bytes
SHA-256: b8483d390d0da1f895d66f8ab37786fe26284972f2bf69fb7f0f3dddec386a4c
font_02_sfnt_off00011372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11372 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.