Malicious PDF — malware analysis report

Static analysis result for SHA-256 1caf52d14550f5c7…

MALICIOUS

PDF

72.2 KB Created: 2021-02-19 22:59:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1ac1663181d3fce5802d41614ef19f77 SHA-1: 595fb01218a1f49bafcfc8b31f5f7cad5bf15e8a SHA-256: 1caf52d14550f5c7a5c5a13c5171f69e728bcd60575a8512913bed88426523b7
184 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=document+analysis+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380700/normal_601294dbca160.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/agjgyda/6449301138.pdfIn PDF document text
    • http://keep-travel.com/54711208840309t3.pdfIn PDF document text
    • http://snapchat-alert.com/the_bourne_ultimatum_watch_online_me6uty2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490746/normal_5ffc8064dc2af.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/geWgfym/wuvikudipekememewosum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450038/normal_60069f22f288e.pdfIn PDF document text
    • https://cdn.sqhk.co/jigidokasaga/Stx2Cqq/guess_the_song_challenge_2010_to_2019.pdfIn PDF document text
    • http://romeita.space/jurododofizameluoyk7.pdfIn PDF document text
    • http://zeropium.com/sigizegogq7xve.pdfIn PDF document text
    • http://copyrightsupport-ig.com/manualidades_halloween_decoracion_puertasn2x4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494875/normal_5fe779f8db19a.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/wunupalezozerud/damegaf.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/bambukat_full_movie_watch_online.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/daviwixenovoja.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/shri_krishna_amritwani_audio.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_off0000dfca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCA 5296 bytes
SHA-256: 1f819e6113ca9c2307ea56cbb284f2670387a1b7b124943a7b295b2c7b5a0703
font_01_sfnt_off0000f1bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BC 10072 bytes
SHA-256: 88033d21bd9cdd2c87d98e604180758574c518be5a0edc10487e5204b6e0009c