Malicious PDF — malware analysis report

Static analysis result for SHA-256 53dcd749f9730639…

MALICIOUS

PDF

69.1 KB Created: 2021-05-13 17:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3cc43ae4f996ab31476cf9b16665d5ef SHA-1: e20d14b765051c6fa593bf58702f9536dbeaf267 SHA-256: 53dcd749f97306399e66753fc4928b2a4f7d940e44f5b3bd1a30eb79cdd917c2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, includes strings related to design tools and application versions, suggesting a lure to disguise the malicious intent. The presence of external URIs indicates an attempt to redirect the user to a potentially harmful site for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/strik?utm_term=sharper+image+design+ionic+breeze+quadra
    • https://cdn.sqhk.co/modesarox/TzjfMjb/sdf_3d_pro_apk.pdf
    • http://zotikarida.medianewsonline.com/rurona.pdf
    • http://gaximivotekole.mypressonline.com/magizitebakezavebuw.pdf
    • http://marifivelaj.mygamesonline.org/74160310901.pdf
    • https://cdn.sqhk.co/sesexibanobu/bhctdQ9/sopolefegatuxidomoxufujo.pdf
    • https://giduzuzetedeze.weebly.com/uploads/1/3/4/8/134853145/5bcc7d.pdf
    • http://gufurebu.medianewsonline.com/orari_metro_cassina_de_pecchi.pdf
    • https://magalezofutik.weebly.com/uploads/1/3/4/5/134599277/8807565.pdf
    • https://cdn.sqhk.co/zasemewiti/bjfMjho/eye_colour_change_camera_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tupesom.atwebpages.com/mikolajexunabufowufon.pdf
    • https://s3.amazonaws.com/bitajemisajoz/celtx_vs_final_draft.pdf
    • https://f0d491a7-7d72-4eea-bbd3-72ad31f48a9a.filesusr.com/ugd/1acdab_ec0a7a2c65d0486f9471ec01388c3083.pdf?index=true
    • https://s3.amazonaws.com/boduxatavepe/bsc_scholarship_form_maharashtra.pdf
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_da35687fc3d945c699dc6221b4860a1d.pdf?index=true
    • https://s3.amazonaws.com/guwutivupudutu/fuzigi.pdf
    • http://kifesafijupesob.onlinewebshop.net/79366828482.pdf
    • https://s3.amazonaws.com/sajatesawodiji/95462040853.pdf
    • https://e082cb0d-9c22-4a21-acb7-e2c6127a51d3.filesusr.com/ugd/ff0c06_286ec845c2a24a08b4ef9a7f8ce60f5f.pdf?index=true
    • https://s3.amazonaws.com/ropuba/99711516755.pdf
    • http://fuvamawijivef.atwebpages.com/kopipatuvit.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_off0000cf8a.bin
070d0f983733f2039a94134368a9c3fd93576d344893178566d5402a36ecdcd4
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8A 5876 bytes
font_01_sfnt_off0000e35a.bin
3b8a3938711a4653afc05c085a14ec963ef2e5b354efaf63bed4b0f1da250079
pdf-font-stream PDF embedded font (sfnt) at offset 0xE35A 10512 bytes