Malicious PDF — malware analysis report

Static analysis result for SHA-256 018d1a7dac75c0e9…

MALICIOUS

PDF

78.6 KB Created: 2021-09-18 19:28:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d49de2a46af9e3b0062839f161b31d1a SHA-1: cbab0780d7455f4cb8fe27217d5aeda49639788e SHA-256: 018d1a7dac75c0e976ca16338d93c8acb64413b6c86929ab35e3cf2f7cee65f9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting it functions as a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, possibly to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://kaus21.com/userData/board/file/tinifupobewik.pdf In PDF document text
    • https://aucordechasse.fr/vosImages/5549821548.pdfIn PDF document text
    • http://ksiclubcom.ksiclub.org/svnprojects/DHD/Source/images/files/jesudabew.pdfIn PDF document text
    • https://www.colline-eternelle.com/ckfinder/userfiles/files/kaxegoridunekemanozibap.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/4809230645.pdfIn PDF document text
    • http://yuqiaohome.com/uploads/files/202109130413423267.pdfIn PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/39132760210.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/jerubovese.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/sobuvawumakonupol.pdfIn PDF document text
    • http://rc-modeller.se/images/file///wefizivisitarilamolur.pdfIn PDF document text
    • https://www.stock2morrow.com/ckfinder/userfiles/files/zapalasovesoxapibotizesun.pdfIn PDF document text
    • http://3sdent.com/upload/files/dideluduzadiki.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/b84a885e4945da30796ecfb94a5fa37f/vibadug.pdfIn PDF document text
    • http://alpes-de-haute-provence.proximeo.com/ckfinder/userfiles/files/26110033966.pdfIn PDF document text
    • http://mopron.ru/upload/files/92538572132.pdfIn PDF document text
    • http://www.jasfec.com/imgs/uploads/nivuvakaz.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/14284f2f159d052c39bf7531c2c772bf/vifim.pdfIn PDF document text
    • http://originalbau.hu/imagesfiles/sisuximemojiregutup.pdfIn PDF document text
    • https://odontologosmalca.com/images/userfiles/file/penadiwumuxaxixiwaze.pdfIn PDF document text
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/vebar.pdfIn PDF document text
    • http://feg.vn/uploads/files/76082350650.pdfIn PDF document text
    • http://perfect-gallery.com/userfiles/file/tozojo.pdfIn PDF document text
    • http://parkingparts.com/Upfiles/file/devopas.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/roketapajegazabaz.pdfIn PDF document text
    • https://uat-tunisia.com/userfiles/file/31753236689.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=download+great+little+war+game+2+apkPDF 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_off0000cdd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EB 10868 bytes
SHA-256: f670b8579bfab4f60312a6789d4d8ccd1917a4ad4fa4bd31f7389f5d57704eb0
font_02_sfnt_off0000fee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE0 17452 bytes
SHA-256: bf0e50bf897d35d3029dbd3b7961723b612314ab256e1f74c162bcbe8545bbaf