Malicious PDF — malware analysis report

Static analysis result for SHA-256 b802308a3cf3d0d3…

MALICIOUS

PDF

78.8 KB Created: 2021-09-14 13:07:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 421ecbfe0bb2de08163e801513d49254 SHA-1: 4c1f787e988756d1a5fd129728e74b8f180b8aac SHA-256: b802308a3cf3d0d31f4ff9611d3fbade34a916661565f60fee0b7c0a5069ec8d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 6

  • 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.
  • 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 https://allytemp.ru/uplcv?utm_term=best+video+download+app+for+android PDF link annotation
    • https://pagodatalk.com/_UploadFile/Images/file/kasefetuxunez.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/12282441299.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/suwuzuxurabapavub.pdfIn PDF document text
    • http://indcms.testingmachines.com/images/file/86781009081.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/85036778910.pdfIn PDF document text
    • https://domilot.com/uploader/files/leromamebidusis.pdfIn PDF document text
    • http://talani.nl/userfiles/image/file/80566004666.pdfIn PDF document text
    • http://nakamurasangyou.jp/app/webroot/uploads/files/fotaxuzimotiduba.pdfIn PDF document text
    • http://mamnonkitty.com/webroot/img/posts/files/boxafexapo.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134a16dc3dd4---63508122580.pdfIn PDF document text
    • https://pgprojekt.pl/Upload/file/72182551148.pdfIn PDF document text
    • https://unitytradecapital.com/ckfinder/userfiles/files/17061843002.pdfIn PDF document text
    • http://www.agenbenangbandung.net/file/seguretilajafabedas.pdfIn PDF document text
    • http://studiolorenzoni.eu/userfiles/files/gobuvevosu.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/49166621102.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/sinisigajoxo.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16132a9e4b5731---dofizezitujedaporux.pdfIn PDF document text
    • https://hamayeshniroo.com/shop/file/52005952657.pdfIn PDF document text
    • https://bibonatura.com/ckfinder/userfiles/files/74949577742.pdfIn PDF document text
    • http://newtarrytowndeli.com/uploads/files/toramonulirarakutego.pdfIn PDF document text
    • http://travelci.ru/ckfinder/userfiles/files/39204214567.pdfIn PDF document text
    • http://bilateralmatters.org/userfiles/file/zawoxumemoxowimi.pdfIn PDF document text
    • http://maezawa-jidousha.com/js/upload/files/78797546424.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://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_off0000d1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B9 10696 bytes
SHA-256: 6454d35487702312d81bfef6f2c7de464ec8bdcaeee1a673d5cb3b4c1cca4a1a
font_01_sfnt_off0000ea7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001028f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028F 16768 bytes
SHA-256: 9e4387d47262b0b4e4cf3b3aeee47272f411e8cd8068cb4548a6b09b3e5c40fd

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