Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa0331d86f78a64…

MALICIOUS

PDF

76.1 KB Created: 2021-02-28 12:33:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0018307b9a7605323bf89213d8885f8c SHA-1: 9109b34ee95986dd34654b4b5eb4916225d9f158 SHA-256: 8fa0331d86f78a64ea053ff69d7e5edf77b965c0499b46d556660082e81c44df
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document's content is designed to trick users into installing a fake browser extension or update. The embedded URL, https://xezojetit.ru/wix?keyword=fm16+scouting+guide, likely serves as the initial point of contact for this social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://xezojetit.ru/wix?keyword=fm16+scouting+guide
    • https://cdn.sqhk.co/nobutowug/gg8ihhd/assistive_touch_for_android_apk_pro.pdf
    • https://xijapesulole.weebly.com/uploads/1/3/4/5/134588017/e1f069d3c.pdf
    • http://tufuwavaziga.mygamesonline.org/36024477499.pdf
    • https://cdn-cms.f-static.net/uploads/4408993/normal_602cb4f9663ff.pdf
    • https://cdn-cms.f-static.net/uploads/4455390/normal_5fe8f6a9f3831.pdf
    • https://vedewoxid.weebly.com/uploads/1/3/0/7/130738666/bejepegibipuw-kezaxupikezem-tozez-safemogizib.pdf
    • http://jaxagogilexet.sportsontheweb.net/thomas_troward_dore_lectures.pdf
    • https://cdn-cms.f-static.net/uploads/4487888/normal_60118de69f7c9.pdf
    • http://ladujose.sportsontheweb.net/wotuze.pdf
    • https://cdn-cms.f-static.net/uploads/4368746/normal_5fdbabb1bb4da.pdf
    • https://cdn.sqhk.co/rubuxupab/Eghjhgi/rise_of_kingdoms_guide_best_civilization.pdf
    • https://fukagopesuzidad.weebly.com/uploads/1/3/1/3/131381553/0b3f03a7f49.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://simavanexija.rf.gd/2847713035.pdf
    • http://vomogowejupilu.rf.gd/57613791650.pdf
    • https://s3.amazonaws.com/bikikanafopavu/debupazujed.pdf
    • http://pefogitoveni.epizy.com/68130227119.pdf
    • http://safipalibeso.rf.gd/69079044757.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee45.bin
55ab49c90bcff0ac5d2b40724c019154e4a0fde19d1c2bf78ebac272a6d13361
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE45 5080 bytes
font_01_sfnt_off0000ff87.bin
5b9fd50dee3becc55ae055fbdc35839c3c5dfd15e9607528b0b9d0d424ab4264
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF87 10508 bytes