Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e771b82d8f6c99…

MALICIOUS

PDF

105.5 KB Created: 2020-11-17 09:05:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7d540f9b72c57f376c82ecaeb147e7f3 SHA-1: de35ee2a38bf3d47ef414a5695e418f2ff29532c SHA-256: 03e771b82d8f6c996f7e4cf7379321cda3f142cc5f3d57cb8c0468624e81b2f1
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://traffmen.ru/123?utm_term=japanese+baseball+stuffed+animals+in+stands In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404745/normal_5f94aed631f69.pdfIn PDF document text
    • https://dosijarirolid.weebly.com/uploads/1/3/4/6/134668623/aba52f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f870ddccca98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_5f8f8597e015a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393641/normal_5f9a664224979.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411937/normal_5fa38094deb1a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9a94a5b6-7325-4ce7-9389-1557e6e9eac9/29614127593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dea6b009-c53d-4f4f-9022-7376420dcf18/81417627179.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/30761563758.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/76131409136.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/burning_soul_worker_haru_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/delta_green_handlers_guide.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A10 3452 bytes
SHA-256: df7be1350d541aa355cc91ca0ca4dcfa9cfbe7b2db3262bb01adecdf88297cb5
font_01_sfnt_off00012686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12686 4992 bytes
SHA-256: c680a07b7dd1c434f81f62e1fff1ced689acf5d77ffdcb913b0488f0ff0bdda1
font_02_sfnt_off00013754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13754 6104 bytes
SHA-256: ab5359a29ae2add530e754cd4c1d21431a92a846ec8b1ac90304325149d01346
font_03_sfnt_off00014d0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D0C 11488 bytes
SHA-256: f3168c007948e9958ae8196fff07bfb14c1e9a24bb6e367e7509e5f3ba23171c
font_04_sfnt_off00017424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17424 16168 bytes
SHA-256: 0216150ac0e5ade23b072752459620ec704bdac01526bfbadd96d51f96873ef3
font_05_sfnt_off0001892b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1892B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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