Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb2ae0ab31ccb33…

MALICIOUS

PDF

72.3 KB Created: 2021-09-21 03:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 94485f06cd40bb773f01067ab85fdb95 SHA-1: 5307ea95c389e57018721a8214c0aeddb7453c47 SHA-256: eeb2ae0ab31ccb3333f1067b4f4bcb5b640c1f4e2b0b95d62cddc77afddc9f86
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URLs, many pointing to PDF files hosted on potentially disposable domains, suggests a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with techniques used to lure users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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.
  • 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://gyogytornasziget.hu/uploads/files/63846496790.pdf In PDF document text
    • https://hgindustrial.eu/userfiles/files/24284055773.pdfIn PDF document text
    • http://jarosi.hu/files/file/60196796322.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/fujamiwuzobumevipe.pdfIn PDF document text
    • https://whitepalacegrill.com/userfiles/57430303277.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613164bfb0a36---xopobewaxadu.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/8715202728.pdfIn PDF document text
    • http://1-sanya.com/blog_images/blog_/file/jofidijazaletebomexud.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/xezafeg.pdfIn PDF document text
    • https://actor-conseil.com/files/file/linezikek.pdfIn PDF document text
    • http://tetraeng.it/userfiles/files/wudoxekevober.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/1ada0c843ac8ee89b0b2f5a7cf1d3bdf/kilimewanetodid.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/kavazi.pdfIn PDF document text
    • http://caythuocdangian.net/images/files/58302866352.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/35980638132.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/vulen.pdfIn PDF document text
    • http://goodlife88.com/uploads/files/71089165595.pdfIn PDF document text
    • http://bige.vn/uploads/userfiles/file/60790430969.pdfIn PDF document text
    • http://thaoduocvn.com/userfiles/image/file/20797566893.pdfIn PDF document text
    • http://yves-segers.be/userfiles/files/70387727584.pdfIn PDF document text
    • https://nyig.com/files/file/57063610491.pdfIn PDF document text
    • http://zvaracskaskola.eu/editor_uploads/system/files/71016346224.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/874975520.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=minecraft+wallpapers+for+androidPDF 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_off0000b610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB610 17368 bytes
SHA-256: 0d2df46d7699f0c3808a13fe4f03a62b424bce1b386583c842535658b07b7dec
font_01_sfnt_off0000e32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32A 10692 bytes
SHA-256: 14bb732e00c95384ad77cc9abb3fb3d75300c79494c12361d4f9e644a2012ad5
font_02_sfnt_off0000fbdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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