Malicious PDF — malware analysis report

Static analysis result for SHA-256 718744d2ee1f7eea…

MALICIOUS

PDF

83.1 KB Created: 2020-12-10 00:13:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c7819699942d888d6eea5314ee380f0f SHA-1: e549f3c614e6497a81cc0a7b0b6d1803340a6a9e SHA-256: 718744d2ee1f7eeaf07abccddcbd5247821363287286dfa6cb316fb167e2ab5b
222 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, and it contains numerous links to external websites, including a known malicious redirector. The document's structure suggests it is part of a link farm designed to obscure the true destination of the malicious payload. The presence of a 'download button' heuristic further supports a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/aws?utm_term=kpt+job+application+form+2017 In PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/diwepubik-mifurekuf.pdfIn PDF document text
    • https://powudeli.weebly.com/uploads/1/3/4/7/134772307/4157353.pdfIn PDF document text
    • https://lajisoxe.weebly.com/uploads/1/3/4/4/134435468/c772a7806e.pdfIn PDF document text
    • https://fetofopup.weebly.com/uploads/1/3/4/5/134507679/5ca493e4706.pdfIn PDF document text
    • https://tozijaletaxe.weebly.com/uploads/1/3/4/3/134312516/lubadidin.pdfIn PDF document text
    • https://gogesatita.weebly.com/uploads/1/3/4/3/134321397/rinuved.pdfIn PDF document text
    • https://kagizorofom.weebly.com/uploads/1/3/4/4/134476017/jurabavezul_wutomuvusarux_pisava_moguwopar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5596540f1034a5cc673dc/t/5fc641bacb3e0f577124f27f/1606828477142/16374232956.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b633d26ff1194f72bba3/t/5fc2463f61e25426e182af75/1606567488370/what_does_relative_mean_in_css.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79a7caa0dc1643a325b40/t/5fcad07c9d29b56e4df46f05/1607127165120/super_mario_world_snes_rom_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c167821-7ab2-47f3-a7d3-f85ca9ce9e81/zijafila.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc70bacfc603311fbf81dbc/t/5fcb0172393ce473562c0542/1607139698667/dezibatalikuduv.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18A 3012 bytes
SHA-256: 1f704321da6c9533394e3daca62f4c9b2d8e087e2f11655debdc550516026f40
font_01_sfnt_off0000ec52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC52 5572 bytes
SHA-256: 3c637f5f2b39cd792642b140cbb5c5392a95dcdfccae7e72d254f11862208860
font_02_sfnt_off0000ff44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF44 11804 bytes
SHA-256: d3cfda3e11a71b5720ef4ba99ff224b9cfad28904931214d735714ed1011b8ff
font_03_sfnt_off000126d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D6 16884 bytes
SHA-256: 7f215dd6965ffb29c29e8b5cfbd7207e5020ad07d447f6fb32c827b616103fbe

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