Malicious PDF — malware analysis report

Static analysis result for SHA-256 96109f90012c24b7…

MALICIOUS

PDF

70.2 KB Created: 2021-09-14 11:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: dce59be86cfa14017e844ba3cfc7fb54 SHA-1: 1fb268abf9f4f9e8d4168f659e0022c7c52a205e SHA-256: 96109f90012c24b71b6eecb274ef72aefff16c8bd917b5a3b0c3a8d205d3eb37
126 Risk Score

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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.
  • 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://hr-serdahel.hu/images/file/48316143012.pdf In PDF document text
    • http://support-cmu.com/filedata/file/87119182831.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/63918047970.pdfIn PDF document text
    • http://lionsmarsala.it/userfiles/files/28956469937.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/24311206988.pdfIn PDF document text
    • http://topp.pl/_topp/file/vejominu.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/lefotawufanixuxeda.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/71920195406.pdfIn PDF document text
    • https://digicpictures.com/downloads/89472838744.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/603np0pa0p63r3c1ooi3gvt664/70243134756.pdfIn PDF document text
    • https://habibitoursegypt.com/ckfinder/userfiles/files/kiperunenax.pdfIn PDF document text
    • http://yuemeism.com/uploadfiles/files/8971981828.pdfIn PDF document text
    • http://goodlife88.com/uploads/files/71089165595.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/bejik.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/lepetifulogaxupodatose.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/55443385307.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e165d6ced0---sebotaroj.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/6248518652.pdfIn PDF document text
    • http://strojsteel.cz/webpagebuilder/ckfinder/userfiles/files/diretanejuwipagesaponu.pdfIn PDF document text
    • http://xn--80aiddhbkcq5bcaz.xn--p1ai/upload/files/88762715887.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=jumanji+2017+ytsPDF link annotation
    • http://s250801404.onlinehome.fr/img/uploaded/file/dubisowepuzurazawopupedo.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_off0000ae12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE12 10552 bytes
SHA-256: 7b9ecc56e9fb59a3949f9671568da3ed9c1c931d8813484dce7c13e1b7d79b3d
font_01_sfnt_off0000c63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC63C 17272 bytes
SHA-256: 45afb9969f46a3df104d0eac7fe2875123628e2171271ccd9b4da9f3ebac3b82
font_02_sfnt_off0000f24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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