Malicious PDF — malware analysis report

Static analysis result for SHA-256 335ff475803c27e8…

MALICIOUS

PDF

72.0 KB Created: 2021-02-19 16:53:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2a43f617661aac6f49e1c7a4284f2305 SHA-1: 2f8ad67a15b1cbd5fa4e7a5e06b9b098e3615feb SHA-256: 335ff475803c27e878c73a6a44821e148870f38296c9f141cb2d3c77c1eed078
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://crophysi.ru/wix?keyword=survival+chaos+wc3+guide In PDF document text
    • https://noresewikikizi.weebly.com/uploads/1/3/1/4/131453465/sidudoxuloxaf.pdfIn PDF document text
    • https://nexuragero.weebly.com/uploads/1/3/4/7/134751893/4674798.pdfIn PDF document text
    • http://prostotit.site/chocolatier_trogneux_lille3fjnd.pdfIn PDF document text
    • https://cdn.sqhk.co/wiluxuko/iuNhfhf/race_the_traffic_nitro_apk_download.pdfIn PDF document text
    • http://rebujewemiv.66ghz.com/malware_antivirus_free_for_windows_10.pdfIn PDF document text
    • http://axecheat9.xyz/vudenokojux45gyc.pdfIn PDF document text
    • https://naxufubiromu.weebly.com/uploads/1/3/0/7/130738890/sopabizidokavenate.pdfIn PDF document text
    • http://walletelectrum.buzz/95381888761k91he.pdfIn PDF document text
    • http://xelirap.22web.org/android_studio_emulator_connect_to_localhost.pdfIn PDF document text
    • https://sizomejuxitiz.weebly.com/uploads/1/3/4/7/134748976/sirobi-mefezotevezuro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fufopabi.rf.gd/33097469766.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/riker.pdfIn PDF document text
    • http://lirufuti.epizy.com/accepting_resignation_letter_template_uk.pdfIn PDF document text
    • http://sotexazonilot.rf.gd/gabrielle_aplin_my_mistake.pdfIn PDF document text
    • http://fokerek.epizy.com/21538645512.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_off0000dbe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE8 5620 bytes
SHA-256: 6a10e4a8382e74e1c50f770d1c81f8f7afcce2ec75367c41c0232925bb601be3
font_01_sfnt_off0000ef13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF13 10588 bytes
SHA-256: f81da96fbceb52a55f0eba609329f7ce2cd2fb830b7c931d7a5a2b5f20a618b6