Malicious PDF — malware analysis report

Static analysis result for SHA-256 84b374d70c0f95d5…

MALICIOUS

PDF

73.1 KB Created: 2020-11-27 10:43:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7e966c9cde7907606a8e30fd9ac10c8b SHA-1: d409479cb7636d9d461765ec8f766772959d09bd SHA-256: 84b374d70c0f95d5715bb441fd21df0926fe6df1bfcaadcf49a521699cbbbc3b
162 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 and presents a deceptive download button. 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-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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/strik?utm_term=dream+savior+gakuen In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_5f8f259f96106.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381104/normal_5fba49558d414.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419857/normal_5fafa232a6133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_5f91d2820bc0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390328/normal_5fa2ef38c3fad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_5fa9b3fde80af.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae6ae88d-b24d-4880-9535-31337fd963c2/the_death_of_marat_significance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f7de07c-f285-47bf-8a12-5e3029152110/6057442277.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98c27e76-504c-40ef-a775-164e895d67d5/17441658676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af24794a-53ef-419f-a049-6c87ffd318dc/fexip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7061d5d-7389-4829-ba77-f3b83b2e0638/20395795826.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/candidate_marketing_email_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/64847588411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d71d91cf-47fa-4b3e-96ba-1c77e0ca8a8b/12024368706.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_off0000e20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20B 5096 bytes
SHA-256: b6dd6e1fd2ed60486ee912d931725f6171939b0ac3fd9de480ab00b45c1ccd84
font_01_sfnt_off0000f35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35C 10764 bytes
SHA-256: ed57cca0380513f70616c3f990e8b7428e55deca24350e9c01c119bb6f6ce8b8

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