Malicious PDF — malware analysis report

Static analysis result for SHA-256 e96a3d1f72f3736b…

MALICIOUS

PDF

70.9 KB Created: 2020-11-29 22:18:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f969a726f4d447ab541794bf2d2d106c SHA-1: 1fb0f031c8b04a3f4aa95f0e397a23aa2862bbd2 SHA-256: e96a3d1f72f3736b306dbeaa9989d33aa8f477ca977b87abf0944945b8248f4c
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 0.9998

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://cctraff.ru/strik?utm_term=12th+street+catering In PDF document text
    • https://daletutanedura.weebly.com/uploads/1/3/1/6/131636587/08b32c73bca8d.pdfIn PDF document text
    • https://nubusoduzotuf.weebly.com/uploads/1/3/4/8/134883140/gijuku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481676/normal_5fbd0c6a56ce5.pdfIn PDF document text
    • https://divuvefa.weebly.com/uploads/1/3/4/7/134759037/refupuza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374956/normal_5fa83a2a48061.pdfIn PDF document text
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/daa79e9cc5.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/sikuva/97240593739.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/20292944690.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/zilimagomezetadiduxokaj.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/proform_345s_crosswalk_treadmill_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/66467617301.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/kptcl_recruitment_2019_notification_in_kannada.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/best_investing_guide_for_beginners.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE10 2968 bytes
SHA-256: 1c91280eb79ffdc858b6ecd2b9b1b9121e398c569f5702dd47e27479ee3b0056
font_01_sfnt_off0000d8b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B6 5116 bytes
SHA-256: 15addf7a1de37b12a8ab0396edf09c868b3fa017c069f87e75a4ed4cca0de587
font_02_sfnt_off0000ea1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1C 11180 bytes
SHA-256: c88bf20b7bf8f4d84fd6882535886a93ecd44e0a23a877e0b5f8e3b2ed644d74

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