Malicious PDF — malware analysis report

Static analysis result for SHA-256 42bff38b6808285f…

MALICIOUS

PDF

78.0 KB Created: 2021-02-19 00:06:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d096301dd693ee102a63e88e1bf0a8bb SHA-1: 21e55824f0445e6213d6f48c3619943f564b4e19 SHA-256: 42bff38b6808285fe43a52a665af034c4281f06e79939a5a2f57d66ddda9b8ba
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/123?utm_term=pride+and+prejudice+movie+1995+streaming PDF link annotation
    • http://xepuvibigin.22web.org/various_daylife_android_apk.pdfIn PDF document text
    • https://ziresaro.weebly.com/uploads/1/3/4/5/134509830/jafese_pulexupirezuzu_dipowufabole.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/ggi00hh/ruzeroxulipotav.pdfIn PDF document text
    • https://leresawukulet.weebly.com/uploads/1/3/1/3/131384076/5dd87aaa22c258.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/5ibXhcd/best_c64_emulator_linux.pdfIn PDF document text
    • https://sesirolomozanu.weebly.com/uploads/1/3/2/7/132741009/ninil.pdfIn PDF document text
    • https://rajilogibakew.weebly.com/uploads/1/3/5/3/135326989/likukom_tagidujibik.pdfIn PDF document text
    • https://vakexojukesazi.weebly.com/uploads/1/3/0/9/130969985/natokiz_vorexikezinu_fegopom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://favagapararo.epizy.com/jogunofujokodedilejixale.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/134405794.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/lagelosevifupiwarawumi.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/afip_siradig_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/harry_potter_book_quiz_with_answers.pdfIn PDF document text
    • http://rafodize.rf.gd/divinity_original_sin_2_multiplayer_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/vcaa_english_examiners_report_2014.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_off0000f30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30B 5828 bytes
SHA-256: 90038d13f2d424d9bae2351350b0910ca1807b46ac1112bba7e7f042ae8bf5da
font_01_sfnt_off000106e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E8 10664 bytes
SHA-256: f5386c7e81276a17324b6f0384d4bb6566218d69146134f25c55e489b56b92ed