Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb5228fcd5f49fe…

MALICIOUS

PDF

69.6 KB Created: 2020-12-25 16:43:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e2a8b885742c16d115909e08a625c582 SHA-1: b053c92b07cecb07fd274efd2433dcd29ab9eed1 SHA-256: adb5228fcd5f49fe91efde3be06fdd6aa14dc2e1695aeef0920c636dc47e98d4
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one specifically pointing to a suspicious URL that appears to be part of a link farm designed to manipulate search engine results. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://trafffi.ru/strik?utm_term=clubhouse+restaurant+garner+nc PDF link annotation
    • https://kuvugelovusilu.weebly.com/uploads/1/3/4/4/134437140/a3e85b209.pdfIn PDF document text
    • https://likosevatifipol.weebly.com/uploads/1/3/4/5/134584064/bipedaxivenuzufobux.pdfIn PDF document text
    • https://logekififej.weebly.com/uploads/1/3/4/5/134502341/f59f8c054da16.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/feliso/adobe_premiere_clip_for_pc_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/95913032210.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/letter_t_coloring_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/chrome_driver_headless.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2dff49e-487a-4944-9c2b-6176d9702a8b/33747328010.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/gate_mathematics_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/dark_mode_android_one.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/10243894395.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/46368661537.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/muvusuludukewutiruriviju.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D2 5104 bytes
SHA-256: 8b1741d5f5d1e605a4f687c94e9af5a1bafb2019b9ddc734f0b489d8a4c59404
font_01_sfnt_off0000e521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE521 10816 bytes
SHA-256: aac5ea3ca6f447606c71a09d38864f260159b88cfbaca7b6e62bb31dc92dc43f

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