Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a8ed49366306dc6…

MALICIOUS

PDF

78.5 KB Created: 2020-11-13 10:08:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f71f9a123e98a28c59828316434c885f SHA-1: b7ebd91f2b19de1ad97b49efc447fb738f7fa1d9 SHA-256: 5a8ed49366306dc64b0e7d5017bcf1b6d2a1809e55ae4f9d2995a138ac51135f
154 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 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 4

  • 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.
  • 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/strik?utm_term=ps1+memory+card+manager In PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/podixebimu.pdfIn PDF document text
    • https://velalozelo.weebly.com/uploads/1/3/4/4/134498802/wosin_sesatifojek_risabefapun_fimotifutisij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5fa57b8f8df25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377909/normal_5f8a64e53758e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369146/normal_5f8866be9747d.pdfIn PDF document text
    • https://jevalibiku.weebly.com/uploads/1/3/4/2/134266190/8320166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464053/normal_5fada5fdf359b.pdfIn PDF document text
    • https://furewerojerekez.weebly.com/uploads/1/3/4/3/134370242/raliderododuwud.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/wupixufekijax/what_were_selena_quintanilla_achievements.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/answers_to_keystone_credit_recovery_algebra_1.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/litomozuvolaxatisipe.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/long_term_effects_of_tmj_disorder.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/90983240709.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_off0000e9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FE 5040 bytes
SHA-256: 67f554a4ef61aff2efef76688546c65ea39ebc3316f29e4dff5c77cd0ccb3f32
font_01_sfnt_off0000fafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFC 10648 bytes
SHA-256: 3d27571f449d2e93d6bbb14f0483ecf135c7aba872518d16a44be0804a5a37ba
font_02_sfnt_off00011f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F76 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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