Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e0519a9d0e87d0…

MALICIOUS

PDF

76.7 KB Created: 2020-12-17 19:58:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 4f60cf15477477966a7d7726ea06c3c5 SHA-1: 7cd613c4a1f7aec51aed374fdd1ae1a2531cac97 SHA-256: d0e0519a9d0e87d073efe62a847faa3bdb309def550a6fcc00aa41fd189167c1
214 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a redirector link and part of a link farm. The embedded URLs, particularly 'https://traffking.ru/aws?utm_term=brush+lettering+guide+free', are indicative of phishing or malicious redirection attempts. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of numerous external PDF links points to a strategy of obscuring malicious intent through a large number of seemingly benign or SEO-focused links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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.
  • 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://traffking.ru/aws?utm_term=brush+lettering+guide+free In PDF document text
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/dojugakam.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/5fc5c9115e8e827d42af5a10/t/5fc9bb7a196a600d3c306a99/1607056253294/xadumibefifefefap.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a394239b0722913c6c92/t/5fc57494f3de5e49b51e3248/1606775957228/music_room_ideas_pinterest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d7bf174-628f-4c39-95fd-c7d92249b7e0/punagisaruze.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc33c8d68612547ed6d2293/t/5fcfbf3e67b6d91287094c0e/1607450431069/99293353197.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe18943485235c868d4e8e/1606293670526/yu_gi_oh_pro_2_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76fb35e8-b5b4-4a6e-b187-d35ece560ca4/keter_tool_box_replacement_parts.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc38b8a116eb00e3c5c96d2/t/5fd0341d0c0c9b10ab003fa2/1607480350346/57046871369.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fd9af9866f3fd2d4d777/t/5fcf51188b174454e99ce3c6/1607422233157/29475856891.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf0175d267866a519fe04e/t/5fd083e9c0a29916a56d5e96/1607500777967/sidezupu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d98e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98E 5008 bytes
SHA-256: 41c81cda32554692f3fae08d56a4c74974f1d47eb5ecfc04dbf4e32d853103ee
font_01_sfnt_off0000ea96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA96 11184 bytes
SHA-256: 8de39479604e5a39c3786af32504240df24fc55383b606e1c42a639cd76f5c40
font_02_sfnt_off00011041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11041 16192 bytes
SHA-256: 0c9d97902ffb76c2bb90ec10612787d93fde30e1015eb44c1a98e69c0dcea6df

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