Malicious PDF — malware analysis report

Static analysis result for SHA-256 66fe78997a5add8e…

MALICIOUS

PDF

77.1 KB Created: 2021-02-08 08:05:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: db6e736beb3a54e1919927a8c574f578 SHA-1: 2f0957a6e25fea3edd4d69f9bc583a2e38a91162 SHA-256: 66fe78997a5add8e26be0a508668a7225d34cfbb0763e4de2796e27f3097e206
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=dead+space+mobile+free In PDF document text
    • https://static.s123-cdn-static.com/uploads/4416675/normal_60038c77c50cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454999/normal_5fe4464bdc770.pdfIn PDF document text
    • http://buzovanukoziba.22web.org/22703041575.pdfIn PDF document text
    • https://lamalirigade.weebly.com/uploads/1/3/4/5/134595912/1153214b2dd3f9.pdfIn PDF document text
    • http://vevolim.iblogger.org/46189750217.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418590/normal_6004d06276cd6.pdfIn PDF document text
    • https://sufifova.weebly.com/uploads/1/3/4/7/134736026/225695.pdfIn PDF document text
    • http://housefashion.ru/191775435861zn8x.pdfIn PDF document text
    • http://tehnoprom.org/xogulunegipetivepuyhlww.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465704/normal_6009da2216b66.pdfIn PDF document text
    • http://prizinsta365.site/eenadu_epaper_today_telugu_downloadyq1w0.pdfIn PDF document text
    • http://freedate18.xyz/80342476559awma2.pdfIn PDF document text
    • http://top-shop-store.website/arrondir_un_nombre_dcimalw5een.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wetowotupime.rf.gd/table_calendar_template_cdr.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/adobe_premiere_pro_cc_2015_trial.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_off0000f1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A8 5440 bytes
SHA-256: 24f6b141df12712161d924f398736febc8fe9684d58fc7eaf762180e4b2595f4
font_01_sfnt_off00010416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10416 10472 bytes
SHA-256: 04e3953cec48f221e90ab4fb9a995e6f37c8568df7a1f09e4afe7704b1b7f6ef