Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2826c215325985…

MALICIOUS

PDF

80.6 KB Created: 2021-09-09 15:14:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: bd5c15bc4b19ace2fe71c55f77751c87 SHA-1: 8f6daec994c3fd8abea761bc088d98d3bb673453 SHA-256: 1d2826c215325985283cf07ffe15bb53e0142a1739ea3700080ffccef528598e
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 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://hanstime.com/userData/board/file/86704136102.pdf In PDF document text
    • https://adikketiga.com/contents/files/gifukagipagulemapivubit.pdfIn PDF document text
    • https://pharma-tools.pl/galeria/file/2459112494.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/zitigizekufel.pdfIn PDF document text
    • http://hamkr.com/userData/board/file/95413687869.pdfIn PDF document text
    • http://eldmsh1.ru/js/ckfinder/userfiles/files/41756595282.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/migilukidusexixadojiw.pdfIn PDF document text
    • https://markmont.eu/editor_uploads/system/files/bozat.pdfIn PDF document text
    • http://tdbm.vn/upload/files/bodobukurilenete.pdfIn PDF document text
    • http://perechen-jurnalov.ru/js/ckfinder/userfiles/files/jizugobepupizisev.pdfIn PDF document text
    • https://liho.cz/UserFiles/File/metuketawuguvez.pdfIn PDF document text
    • http://autoservizimensi.it/images/fck/file/teforokowujuwise.pdfIn PDF document text
    • https://mkontakt.pl/dat/file/sewasutoxetirulomi.pdfIn PDF document text
    • https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/69294193145.pdfIn PDF document text
    • https://tasteadmin.com/ckfinder/core/connector/php/custom/wysi_uploads/files/9571682498.pdfIn PDF document text
    • http://mpwlawpa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jepadalu.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/56304851049.pdfIn PDF document text
    • https://safetypadlocks.eu/eurostyl/photos/file/49394671153.pdfIn PDF document text
    • https://foursservices.com/nbloom/fckuploads/file/5106844998.pdfIn PDF document text
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/70464883984.pdfIn PDF document text
    • http://runwellconsulting.eu/file/file/15068531845.pdfIn PDF document text
    • http://shanghaiqingchen.com/upload/files/lepin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=gerund+infinitive+list+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_off0000d5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FE 10412 bytes
SHA-256: 8de9e3793e23ad150ca3eb5f0bc7a33c5b413573d8613a744559de17a066e725
font_01_sfnt_off0000edb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C7 17892 bytes
SHA-256: e4f73732e4a53879f0641a24ecdb43d93ff9f526baa331600e3080e7a1431d29

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