Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e48d02b582c082…

MALICIOUS

PDF

72.2 KB Created: 2020-11-10 11:15:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2f2d8d03f902a79e9e69b9d661dea7b2 SHA-1: d9f8a71e5cdec34c669d9d21f6054e4067ed41b8 SHA-256: b1e48d02b582c082946fdeb35718560f5e57fd2f272a84b9a1d928def370f669
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 0.9997

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
  • 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://gettraff.ru/strik?keyword=chevy+volt+service+manual+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388177/normal_5faa542a0bf7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391013/normal_5f9c66ace665b.pdfIn PDF document text
    • https://suxomaloki.weebly.com/uploads/1/3/4/5/134598925/6024792.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/28db4e9a9b3cc.pdfIn PDF document text
    • https://kazajiti.weebly.com/uploads/1/3/4/4/134456981/8142936.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/tazixusimidun_zozagipaka_nikorib_mufatu.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://s3.amazonaws.com/gupuso/58403384170.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/19455987796.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/soruluwurefodutesitefig.pdfIn PDF document text
    • https://s3.amazonaws.com/kalufizefem/hulu_app_download_free_on_lg_smart_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/84783761538.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_off0000ce30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE30 5460 bytes
SHA-256: dfe2554d023cce3204ef21b1bee735c08826fc05502d6ad759ab4d4861a41d76
font_01_sfnt_off0000e0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A8 10912 bytes
SHA-256: 47d08217fe87319a7d93f439fc0abc8717f82be392757de1cf1d45abaccbf918
font_02_sfnt_off000105e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E8 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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