Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b0c834cbc5fd473…

MALICIOUS

PDF

71.9 KB Created: 2021-02-26 01:39:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 874ef7d036e1798390eb20e79e3f4a65 SHA-1: fe5c950c7aa04ef269d3b9ab155dc2d4e677f438 SHA-256: 8b0c834cbc5fd4730087f6ca53f685f7d1775c10ac5fafdf4ed469e40c337f08
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/wb?keyword=yaesu%20ft-450d%20for%20sale PDF link annotation
    • http://mon-cmbretagne.com/suntrust_mortgage_payoff_mailing_addressdvmnb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418401/normal_60207a859fbf7.pdfIn PDF document text
    • https://cdn.sqhk.co/gebunemif/aigjhid/make_apps_a_list_on_apple_watch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384320/normal_6026b1d066942.pdfIn PDF document text
    • https://cdn.sqhk.co/xoluxuroku/chiGvjj/today_s_date_in_spanish.pdfIn PDF document text
    • http://afracheat9.xyz/blockman_go_apk_hacktec59.pdfIn PDF document text
    • http://kernig.online/radijamonizet2z80k.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nezuwuxupewe.rf.gd/world_cup_2018_predictions_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/66321437450.pdfIn PDF document text
    • http://nibimasumexugi.rf.gd/98665097831.pdfIn PDF document text
    • http://nerinelofew.rf.gd/pewuxidefat.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/61058609730.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/75646621207.pdfIn PDF document text
    • http://dufogatate.epizy.com/napanasidejewesaxiv.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/sheet_metal_gauge_chart_uk.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_off0000da90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA90 5248 bytes
SHA-256: a4fe4e0ef7fd9555c1b8f15b8755eba525a3d72b631cf009a99d9a344fca37d1
font_01_sfnt_off0000ec85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC85 11360 bytes
SHA-256: 111d942be49c59b2f1651d74eb2453a11b786a2e2e5a34ba936646d1eab06aae