Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab3e88d9f1a5bb6…

MALICIOUS

PDF

74.0 KB Created: 2021-02-21 21:39:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3113c460acc6930aadf65abe1c7d3235 SHA-1: dca237edcba9aa6a0c3783fe5623d4eedbd879d3 SHA-256: 9ab3e88d9f1a5bb6aeae4dfdafcd29d05580df9869a333465f267df09d8bdeb2
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://leonvi.ru/aws?utm_term=ideas+and+opinions+meaning PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487187/normal_60185517e0eb9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486190/normal_5ff4b17953d38.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420915/normal_5ffa85c32b7bc.pdfIn PDF document text
    • https://jedifubebevaze.weebly.com/uploads/1/3/4/8/134873515/digebelizuvalokut.pdfIn PDF document text
    • https://davidfjames.com/podcast/BP016-idea-or-opinion.mp3In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/14621819342.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/brute_force_password_cracker_android.pdfIn PDF document text
    • http://zelulujo.epizy.com/mifevibuxabexi.pdfIn PDF document text
    • http://dezizogumeb.epizy.com/zajowikelolasidivuzuzer.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/nivifovasawapitivulib.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/veluperurozikupumu.pdfIn PDF document text
    • http://mafatiwi.rf.gd/descargar_whatsapp_plus_azul_para_android.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/exponential_notation_worksheets_grade_8.pdfIn PDF document text
    • http://tovegini.epizy.com/new_bangla_calendar_apps.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/elements_of_queueing_theory_with_applications.pdfIn PDF document text
    • http://bujazux.rf.gd/employment_history_form_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/amoeba_sisters_video_recap_osmosis_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/brevini_planetary_gearbox.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/21344134852.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_off0000e3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F1 5088 bytes
SHA-256: 167b8a215a515c3619e12d73671f1e06a1ceb96abe09bf5abb510b180ffd9ac0
font_01_sfnt_off0000f535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF535 11012 bytes
SHA-256: 23150bd2ac93451b03078296ca516c93a47c52568d34374b05cb002268b1d666