Malicious PDF — malware analysis report

Static analysis result for SHA-256 452aa8c35894aed0…

MALICIOUS

PDF

66.5 KB Created: 2021-06-05 18:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1e7f0a80c55375de8a267502dbdd36bb SHA-1: d0c36516e996eff071e96b0e46bb770ff4c785fd SHA-256: 452aa8c35894aed0fed40a05a9147ef083ea728d75c2f5e8348b3c81ea72c503
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document functions as a link farm, presenting itself as a search result for a 'Toyota camry 2002 repair manual free download' to entice users. It contains numerous external links, many pointing to disposable hosting, designed to obscure the ultimate malicious destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lead users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8275

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://medvor.ru/pbw?utm_term=toyota+camry+2002+repair+manual+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378164/normal_604834726e260.pdfIn PDF document text
    • https://vujezogovi.weebly.com/uploads/1/3/5/3/135348950/jukakowofusol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407081/normal_6034a094e6b5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453891/normal_6060cb28501f3.pdfIn PDF document text
    • https://fajuvupo.weebly.com/uploads/1/3/5/3/135310445/ratugagerosamud-jokokup.pdfIn PDF document text
    • https://radenomubadinor.weebly.com/uploads/1/3/4/1/134108668/8f5f6e870.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://noxiwako.pbworks.com/f/81199851256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96b00fc0-c8d5-44b8-8899-694bc48d6052/dopobefasujuredasefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d4a81ac-a5b4-43c9-8763-b997bc6bad09/abrsm_music_theory_past_papers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08ef0854-61e5-481a-b7ff-7afe348deeab/introductory_econometrics_wooldridge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/173c2009-1f6d-4706-abc7-9ca42f8428ff/gutisadaxisevidoxe.pdfIn PDF document text
    • http://nipekari.pbworks.com/f/god_talks_with_arjuna_the_bhagavad_gita_-_hindi_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bccb437f-7c83-4450-8dc7-df388f699e18/biblical_meaning_of_mathematics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e51ab23-ce3c-4cc0-8245-c00d94168ba4/zakoxabu.pdfIn PDF document text
    • http://bemulopawed.pbworks.com/w/file/fetch/144444672/fifty_shades_darker_full_movie_download_in_hindi_worldfree4u.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a886817-0d2e-4e20-be64-08259428bf90/gesosimelalagima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdd1752a-68f9-4aef-9760-07e44eab9518/86955103720.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdd0e960-e7f1-43b6-b88e-0a7fd88f7b5f/2241681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bacdd101-30a0-4275-8e51-a9a850df87f2/latest_news_between_india_and_china_in_hindi.pdfIn PDF document text
    • http://sazupamufode.pbworks.com/f/how_to_apply_arrear_exam_in_madras_university.pdfIn 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_off0000d755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD755 5420 bytes
SHA-256: 0f247375de6ae48e136d5d33c8a552911c3a6276cf0791394196300b5ced495a
font_01_sfnt_off0000e9b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B8 9968 bytes
SHA-256: 81e95aadbdd9f24cb8609b582d488256554c46cb4dc64d0d3a8a01c898ceab92