Malicious PDF — malware analysis report

Static analysis result for SHA-256 e77ea0069ed1a82d…

MALICIOUS

PDF

76.0 KB Created: 2021-02-04 14:45:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b45c9fc42eb12c2fda2639742744330a SHA-1: 2b890e0934a689664fd38bb691e95904a2ed2620 SHA-256: e77ea0069ed1a82d7adf07b694ce7eb337a989e70de9cf2c42491537d7a6ec73
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards an attack pattern designed to redirect users to malicious sites.

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
  • 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
  • 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://druttle.ru/wb?keyword=best%20bollywood%20movies%20%20side PDF link annotation
    • https://wopokajam.weebly.com/uploads/1/3/0/8/130874492/zikivarokaxokus.pdfIn PDF document text
    • https://cdn.sqhk.co/givogaduta/tigjhEA/multi_strike_super_times_pay_video_poker.pdfIn PDF document text
    • http://kyhni.site/11443112375pq5wj.pdfIn PDF document text
    • http://matteset-spon.space/world_political_map_blank_a4_sizedv259.pdfIn PDF document text
    • https://ponozivodu.weebly.com/uploads/1/3/0/7/130775347/3626543.pdfIn PDF document text
    • http://triple-doska1.club/dreamville_down_bad_videotodmj.pdfIn PDF document text
    • http://yogist.fun/nikojukugiduwabililuzitoljl2yk.pdfIn PDF document text
    • https://jefaganogebe.weebly.com/uploads/1/3/1/4/131437435/jorozogalizorij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kotodur/89693125928.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/tosofirabuledu.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/bedapigetikuladow.pdfIn PDF document text
    • http://bapomel.epizy.com/bayonetta_2_witch_trials_guide.pdfIn PDF document text
    • http://xavisijividefo.epizy.com/reporter_ohne_grenzen_gettete_journalisten_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/instagram_story_games_questions_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/13003581427.pdfIn PDF document text
    • http://filutapokupa.epizy.com/mobile_technician_resume.pdfIn PDF document text
    • http://pomolado.epizy.com/pandoc_templates_location_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/cpap_neonates_guidelines.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_off0000ed6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6B 5108 bytes
SHA-256: 76b5f61f1289012789e366260c5ca8e9ad9474c9d6a0d0c7091388297593efa9
font_01_sfnt_off0000fed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED8 10568 bytes
SHA-256: 7128f35f5511b399f33da8680f3cbd42c0d263bcadcd0beab6e2aea90f140026

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