Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bf552ad08c3a103…

MALICIOUS

PDF

72.9 KB Created: 2021-02-14 09:50:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0bcd32b5785ff165ad6d3acddda1811e SHA-1: aa43b259ca2490ff6d7c4301dc274ae86083ef36 SHA-256: 3bf552ad08c3a103793b052520b1f4e9f384f63730483b6306ab587d9ef83b03
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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 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.
  • 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/wb?keyword=gatwick%20airport%20departures%20live%20flight%20information In PDF document text
    • https://static.s123-cdn-static.com/uploads/4419629/normal_5fe39cea3bb8b.pdfIn PDF document text
    • https://cdn.sqhk.co/wetabupi/figeLQu/66187980622.pdfIn PDF document text
    • https://cdn.sqhk.co/fezusife/aIihjdc/wukinovelovukutizor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488842/normal_6010efea8aa27.pdfIn PDF document text
    • https://ninijaliwejito.weebly.com/uploads/1/3/4/3/134350726/lukakalunalas-muraj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410414/normal_60166d2ea4d13.pdfIn PDF document text
    • https://nadagedo.weebly.com/uploads/1/3/1/8/131858166/661865794.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403283/normal_6025cb548ea7a.pdfIn PDF document text
    • http://bestpriceforukraine.xyz/baby_crying_sound_ringtone_freeku3xo.pdfIn PDF document text
    • http://smeshnoykir.space/50302935972rckgw.pdfIn PDF document text
    • http://prizinsta.online/832060396645mqgk.pdfIn PDF document text
    • https://cdn.sqhk.co/radageroboko/hbYAiat/pizadesula.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450439/normal_60047efea8f02.pdfIn PDF document text
    • https://cdn.sqhk.co/xewimoziwuvo/jgNRgdx/16116977401.pdfIn PDF document text
    • http://kihepc.xyz/baaghi_2_movie_theme_ringtoneg6gb6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000df09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF09 5816 bytes
SHA-256: d97af2ac5ac01a6bf7765e790c53fe935e83fd2667e3b049441c62d2e697e154
font_01_sfnt_off0000f2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D2 10476 bytes
SHA-256: 7f4654e6394f6592ab7312a173688bad04ef2929cd211e31c109425ab3b7cf3f