Malicious PDF — malware analysis report

Static analysis result for SHA-256 e13a304bdbd2e4ab…

MALICIOUS

PDF

81.2 KB Created: 2021-09-08 19:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: f6a9cf0026f349eb7749fb10e1287e00 SHA-1: e08a6e38a3d24e3ad454e422952e2e36e39dfbf1 SHA-256: e13a304bdbd2e4ab66b9add715c2ca62ecd57ad33a78a91893bdea5edfa4624a
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 0.9977

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://senhewood.com/d/files/pijido.pdf In PDF document text
    • https://nabil-doukali.com/userfiles/file/bujuboxudap.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/jarovawajafiguz.pdfIn PDF document text
    • https://rumusjitu.com/contents/files/ruzofinemosukaxus.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/99932244408.pdfIn PDF document text
    • http://rebornfair.com/FileData/ckfinder/files/20210901_0D3B0210CC65CC8E.pdfIn PDF document text
    • http://hourinkan.net/js/upload/files/29539952254.pdfIn PDF document text
    • https://cepatdaftargroup2.com/contents/files/94955074834.pdfIn PDF document text
    • http://rulada.by/upload/editor/files/18392765589.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613343242fb28---lotefewejasivodedoraz.pdfIn PDF document text
    • http://gmei.lt/ckfinder/userfiles/files/54431106535.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/53165422160.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/33340378789.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/o9lk57f4l5ma1a2acoet93hnt2/25139580658.pdfIn PDF document text
    • http://beverly.kopanramen.com/uploads/files/vexewe.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/99540110353.pdfIn PDF document text
    • http://ipublicity.cz/data/file/zobupixutad.pdfIn PDF document text
    • http://boissee.fr/userfiles/file/xemitofaxeviro.pdfIn PDF document text
    • http://www.salpasafarit.fi/tiedostot/files/banuxabikejefom.pdfIn PDF document text
    • http://buyyoutubecomments.com/ci/userfiles/files/xiketopawumota.pdfIn PDF document text
    • http://musicandyouapp.com/webupload/editorimg/files/78365210935.pdfIn PDF document text
    • http://dfanchem.com/upload/files/pijagimis.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/migasiwojewuma.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=discovery+vitality+2020+pdfPDF 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_off0000d6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D1 18056 bytes
SHA-256: 115ea576692b47b22e5c8ba20813fada97e14bd1e551e0926008aeb6ef82743d
font_01_sfnt_off0001057f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D96 10932 bytes
SHA-256: 0f9e24e3ee1b1b9d36602209f32f473acf22421fd77496196478e4dc3ccf64f5

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