Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8a70a2b9432430…

MALICIOUS

PDF

89.2 KB Created: 2021-10-12 01:33:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: f263399529049a768127496cdecfec35 SHA-1: 07d3c60b842d17745cd666af58f49fcc89cfe190 SHA-256: aa8a70a2b94324302569387e87aee8b06d6925396c0a49672eb4f0bed100557a
154 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://maryalo.com/userData/board/file/46841059544.pdf In PDF document text
    • http://tongkhomica.com/upload/files/sefevumoke.pdfIn PDF document text
    • https://millvalley.com/wysiwygfiles/file/26496884230.pdfIn PDF document text
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/59601216372.pdfIn PDF document text
    • http://pedraferro.com/files/files/1413838058.pdfIn PDF document text
    • https://gerbangkuis.com/contents/files/vumesotizopadagolugu.pdfIn PDF document text
    • http://itfkarnataka.com/cvsprojects/SSK/Source/2.0.0/images/files/nubobozigoxupupaboxizopan.pdfIn PDF document text
    • https://bda.ch/ckfinder/userfiles/files/nikujedivefatamogur.pdfIn PDF document text
    • https://tannhatviet.vn/upload/files/jiperexoxureserilajafoza.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/77198384081.pdfIn PDF document text
    • http://saluteebenesseresas.it/userfiles/files/95104975899.pdfIn PDF document text
    • http://zamaro.info/images/fcke_files/file/tuneku.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/35248764845.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/94536083167.pdfIn PDF document text
    • https://agri-mal.pl/userfiles/file/97309102400.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161401fcbd8e6b---sodosavinazekibanukutidu.pdfIn PDF document text
    • http://jujucuisine.com/userfiles/file/2318275497.pdfIn PDF document text
    • https://history.tlshaa.org.tw/ckfinder/userfiles/files/xowipawoxebun.pdfIn PDF document text
    • http://capriololaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58079810091.pdfIn PDF document text
    • https://cheeselicious.net/UserFiles/file/gebutijodivizisu.pdfIn PDF document text
    • http://volker-issmer.de/userfiles/file/vesotanoxobusino.pdfIn PDF document text
    • http://grupophi.es/uploads/files/52109005537.pdfIn PDF document text
    • https://jagamimpi.org/contents/files/rosofex.pdfIn PDF document text
    • http://naturestuff.nl/siteimages/file/lanafibebas.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16141117a3e2fe---mivasojizis.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/RC0zOYPQW8A/uplcv?utm_term=how+to+write+a+cv+examples+for+studentsPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10701 11124 bytes
SHA-256: 6a9bfc7d5cba7dec95da51352a829e06fb4b415ae3833556598b8bb30163caae
font_02_sfnt_off000120fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120FA 20756 bytes
SHA-256: d22651a4a29566d8e545edd3c9564d6744fd9cff851a5e309a13cfa33d977b71