Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c7df61295723a29…

MALICIOUS

PDF

73.0 KB Created: 2021-02-13 21:16:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3baf36e228b6c2d892208ce6a70bb360 SHA-1: 599ea10bf4125bad86cb21815ffa12898b73507a SHA-256: 3c7df61295723a2969ca5c7f6ca646cbc5b5a989b9840d5fc3a8192486c952c4
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=vc_redist%20x64%202013_x64.%20exe PDF link annotation
    • http://melodabogaso.66ghz.com/unbreakable_full_movie_300mb.pdfIn PDF document text
    • https://disaximineta.weebly.com/uploads/1/3/4/8/134883765/3055121.pdfIn PDF document text
    • https://zanugikujo.weebly.com/uploads/1/3/4/3/134399251/4da5c9d2d2de.pdfIn PDF document text
    • https://cdn.sqhk.co/sufiwotag/75jbgco/airplane_drawing_tutorial.pdfIn PDF document text
    • https://bugajujifupub.weebly.com/uploads/1/3/4/8/134894919/d44bdd88fa5a0a.pdfIn PDF document text
    • https://cdn.sqhk.co/toxodabatot/hgAwpmI/zutunago.pdfIn PDF document text
    • https://mewodufupojapoz.weebly.com/uploads/1/3/1/8/131857890/butabetoweneg.pdfIn PDF document text
    • https://gisimezibeze.weebly.com/uploads/1/3/0/8/130874543/wijowivijujana.pdfIn PDF document text
    • https://sukanogijero.weebly.com/uploads/1/3/4/3/134333185/sikigogozulez.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/SUejdG0/aaa_auto_insurance_quote.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/zufufiwubijobuzowa.pdfIn PDF document text
    • http://gawoloresi.rf.gd/argumentative_essay_thesis_template.pdfIn PDF document text
    • http://sowiveporumege.epizy.com/encyclopedia_of_medieval_philosophy.pdfIn PDF document text
    • http://dubexejevobogi.rf.gd/homemade_white_bread_nutritional_information.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/44505234476.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_off0000de1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1E 5516 bytes
SHA-256: 9e1125aa9bea6ea42f632bb6cf87e1771c3cceada488aecbd3a9d7f6c5a53a2f
font_01_sfnt_off0000f117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF117 11292 bytes
SHA-256: a4ac10d23e5124289073b2ec3731a8d83a63a0465781a1f544a074bc9d361317