Malicious PDF — malware analysis report

Static analysis result for SHA-256 69bdf8248631cdcb…

MALICIOUS

PDF

74.6 KB Created: 2021-09-17 02:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 0483d83884692aa4196e84c779470566 SHA-1: 68662d13475c588d01e4ff9115a88460edee776a SHA-256: 69bdf8248631cdcba77eca63bb1254de16727aaf715e0ce9a7df66abcfe83169
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic firings and the presence of numerous external URLs, many pointing to potentially disposable domains, strongly suggest a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • 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://vaonhaphatphap.com/images/uploads/files/nuviduboxagel.pdf In PDF document text
    • http://olympicburger1988.com/uploads/files/20232867994.pdfIn PDF document text
    • https://ichibaninfotech.com/ckfinder/userfiles/files/fusezuxo.pdfIn PDF document text
    • http://epwuae.com/userfiles/file/biligajefafosala.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/9523f72db4e685ce4526e169cc6f0e09/64394566293.pdfIn PDF document text
    • https://okinawa4d.com/contents/files/sesiwezujesapuguwefuve.pdfIn PDF document text
    • http://baove24h.org/upload/files/93810620353.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142259e0297e---60143107574.pdfIn PDF document text
    • http://thamdinhgiadaiquang.com/img/files/zekodokoxub.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/55176458204.pdfIn PDF document text
    • http://erulingua.hu/uploads/content_files/files/16556552840.pdfIn PDF document text
    • http://aeusjtu.pretty-match.com/upload/files/31936990993.pdfIn PDF document text
    • https://projectmine.hu/ckfinder/userfiles/files/61895209990.pdfIn PDF document text
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/75737039786.pdfIn PDF document text
    • https://www.rosebankprimary.co.za/inc/ckfinder/userfiles/files/zafawadoroxaraj.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/47427594753.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gutukokulasitad.pdfIn PDF document text
    • https://associazionebriciole.it/public/file/64865633657.pdfIn PDF document text
    • http://fuguchair.com/upfolder/e/files/20210910224341.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/motazekiki.pdfIn PDF document text
    • http://meuble-tunisie.com/userfiles/file/6550067217.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/safibebufosuzuz.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/72154980220.pdfIn PDF document text
    • http://www.sainteuphrasia.com/www/js/ckfinder/userfiles/files/19815021306.pdfIn PDF document text
    • http://modulobase.com/userfiles/file/gajusawokibisokesusego.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=tekken+tag+apk+download+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_off0000c181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC181 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD993 16684 bytes
SHA-256: ce191416b3551e1155c915842247103af507638241b4fdbeac7889be843d1ff8
font_02_sfnt_off000104c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C7 10644 bytes
SHA-256: 612125e89ec918e76b18d06b8ccac4ad5de70214f396e2c078de90937012de46