Malicious PDF — malware analysis report

Static analysis result for SHA-256 218693cb00d6f08e…

MALICIOUS

PDF

83.4 KB Created: 2021-03-15 23:50:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2a90d14d91899212b7e396efde21b88 SHA-1: e462b59f21a3ea4a7920433dc69b3873c11345e6 SHA-256: 218693cb00d6f08e8002f031d43f70ed63a66385a5ee47363c17690822d8cfd8
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains multiple external links, including one identified as a potential lure for downloading APKs. Heuristics indicate a payment redirection lure and a mass external link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/wix?keyword=best+free+apk+editor
    • https://static.s123-cdn-static.com/uploads/4450631/normal_5ffc5d449939c.pdf
    • http://xenakasewexibal.sportsontheweb.net/alrededor_de_tu_mesa_partitura.pdf
    • https://cdn-cms.f-static.net/uploads/4377371/normal_602163227869a.pdf
    • https://wudonazig.weebly.com/uploads/1/3/4/6/134675044/5189490.pdf
    • https://cdn-cms.f-static.net/uploads/4471704/normal_6048d25d6c856.pdf
    • https://vebodejivab.weebly.com/uploads/1/3/2/3/132302978/9f22a945c.pdf
    • https://jovegubegatok.weebly.com/uploads/1/3/5/3/135318826/ragaxulosulix.pdf
    • http://gukevipagopu.mywebcommunity.org/bugudetalozeje.pdf
    • http://lozomaneje.getenjoyment.net/2013_cub_cadet_ltx1050_parts_diagram.pdf
    • https://cdn-cms.f-static.net/uploads/4369766/normal_5fd10cbc292f3.pdf
    • https://zemizipip.weebly.com/uploads/1/3/4/0/134098502/damivifejebitoji.pdf
    • https://dakewamegiru.weebly.com/uploads/1/3/5/3/135305658/3958697.pdf
    • https://cdn-cms.f-static.net/uploads/4405953/normal_604243e40a666.pdf
    • https://gopadafuwidu.weebly.com/uploads/1/3/0/7/130740623/695496.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tutapaxi/conjugar_verbos_en_ingles_todos_los_tiempos.pdf
    • https://s3.amazonaws.com/zuxime/weather_report_for_meerut.pdf
    • https://s3.amazonaws.com/widuxade/excel_product_costing_template_free.pdf
    • http://fanalejowegop.atwebpages.com/korean_childrens_stories.pdf
    • https://s3.amazonaws.com/xabalaru/saroromivusekiz.pdf
    • https://s3.amazonaws.com/rivazixexuguri/madewalifofameva.pdf
    • https://s3.amazonaws.com/vawoginele/pelizali.pdf
    • https://s3.amazonaws.com/luworizesupox/buckeye_az_crime_reports.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001095f.bin
172f2341d2b7136dd031c1177a0e34b64dcd3e2006fbc55fa5ce7d5cf005742a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1095F 5116 bytes
font_01_sfnt_off00011adf.bin
86f1687bc3c7d865fa5b5335914daf888874ec4ed6cb7b54d5c1a162c585a985		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADF 11188 bytes

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