Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f80283b4304c222…

MALICIOUS

PDF

65.6 KB Created: 2021-02-21 18:20:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3c6537f2cced842c53c11083e5b9e85b SHA-1: f316b81cdc26fbafd2e3792aea1414a3a350e235 SHA-256: 9f80283b4304c222f5684478df60f93154ab81937f482fe1f77a45ffb9d0327b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically `https://crophysi.ru/strik?utm_term=merchant+of+venice+movie+watch+online`. ClamAV also detected the file as `Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0`. The document body, though heavily obfuscated, contains text related to 'Merchant of Venice movie watch online', suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://crophysi.ru/strik?utm_term=merchant+of+venice+movie+watch+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4474998/normal_600f5777cf929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414501/normal_5fd87b79193dd.pdfIn PDF document text
    • http://rubka.space/2829317033785euu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454670/normal_5fd7f2a837a76.pdfIn PDF document text
    • http://kernig.store/hungry_shark_mod_apk_unlimited_coinshy0p7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463824/normal_602456b90050d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403141/normal_600fb99843d22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412387/normal_5fe2abf60e9ae.pdfIn PDF document text
    • http://usejus.club/healthy_vegetarian_recipes_for_weight_loss_on_a_budget1gsxn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405638/normal_601a01d63956f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379602/normal_5fce5cdc0c9ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389084/normal_5ff7735ce6f2a.pdfIn PDF document text
    • http://cosmicgig.com/soxixizafukejafenuraga8zco.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419851/normal_602a8eb93e15d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424024/normal_60257a504604f.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/jebokizez/caniuse_es6_template_literals.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/animus_stand_alone_apk_and_data.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/88322582758.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/7_step_problem_solving_process.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/58009477410.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_off0000c530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC530 5100 bytes
SHA-256: 98ae45bc757ebe62ea6ecc9e103f25074b5d3fa472d5e2f52133fe48805365dc
font_01_sfnt_off0000d684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD684 10376 bytes
SHA-256: e5f56893047852df34b621a738664bffd54ef5bba622820502d1be9436ec15e0

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