Malicious PDF — malware analysis report

Static analysis result for SHA-256 db525ed7dd2f81f6…

MALICIOUS

PDF

61.8 KB Created: 2020-12-06 03:48:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d0aa62e8053fc052ea2c060d44137f4a SHA-1: c81450ad5c20f4ee7eafcaf3e61a4f7d9a1f166d SHA-256: db525ed7dd2f81f605c7a215de2e60757d6631db9f0b710eb8aa04eeb49e22b8
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ggtraff.ru'. Additionally, it features a PDF link farm with numerous external links, many of which are benign but one points to a potentially malicious redirector. The ML classifier and ClamAV also flagged this PDF as malicious, indicating a high likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://ggtraff.ru/aws?utm_term=arise+game+apk In PDF document text
    • https://xexiwimelogodit.weebly.com/uploads/1/3/4/5/134593193/kowurusapa.pdfIn PDF document text
    • https://pilolekolaf.weebly.com/uploads/1/3/4/6/134655903/cedc4bfeef2.pdfIn PDF document text
    • https://toguxobuse.weebly.com/uploads/1/3/4/9/134902292/wegafe_zodeve.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/5599216.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/5fc51b762e537a05ef2436ee/t/5fc657694f98375720b718c9/1606834026668/space_trader_palm_os.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e60b24b06a7eb3ff207b/t/5fc14cd2173fb5383bd29cec/1606503635222/message_blocking_is_active_iphone_7.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0daa45ca4f7902686620/1606225322978/57882988023.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc19a8f40f1034a5caddecf/t/5fcb931ba0b42e3566aa7bc5/1607176987459/zinopuzafupojada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d1160eb-e115-46b9-b05f-49573ab7b07d/wobefatavozidegabi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e7b740f1034a5ca8d025/t/5fc4d86908845d092422479a/1606735978356/taweb.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4b08145a8629dca72e62/1606372104673/tudakezuxupizunebisolujo.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/17887732635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1352be13-8ab2-4be2-9f16-c405d8d1cd7a/79817467187.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_off0000b471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB471 5160 bytes
SHA-256: eaf3b3860c419f357ac1852f40c4013486c83fd1fda45912ccd43ef60f97965f
font_01_sfnt_off0000c5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5EE 10868 bytes
SHA-256: b071b8e50c13569265d309086d9e1cf5384cbca4f89bab622ebcaf8fed577c34

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