Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad2148c702e8b88c…

MALICIOUS

PDF

71.5 KB Created: 2020-12-18 10:58:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 76b4594d8b97f3c6d11f27b4c877e09c SHA-1: 69b50a17cd940d37f19787101b87425ab175482a SHA-256: ad2148c702e8b88c0548a27a42a60b1beee94fa5381b888413340202d92e9ae5
156 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. 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/123?utm_term=king+frost+persona+5+royal+weakness PDF link annotation
    • https://fopojikanerev.weebly.com/uploads/1/3/4/8/134888820/80e08726.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470038/normal_5fd7a911a5cdd.pdfIn PDF document text
    • https://joxoxego.weebly.com/uploads/1/3/4/6/134664344/ec4de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369920/normal_5f8d38b4c8159.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484999/normal_5fae157f46df2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421048/normal_5fb7e713270ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc64bd4084698658e8310f1/t/5fd23198eeaf2774ac97ec88/1607610777283/69393857096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcb1ac12-a2de-41e8-853d-36f77d24245d/portland_leaf_blower_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a54d905b-bfeb-458d-82d7-846a7d6cb443/58311352280.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54703c30a162e0c6f6b7a/t/5fc7a05b4f9413233b277a94/1606918241699/76657094056.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc794bc5f0d731e16ad0348/t/5fcebf9b24ae147ef3c8d4bf/1607384988609/baviju.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfff2111f6a4198480a438/t/5fc50566f3de5e49b5034b8e/1606747494679/83416928338.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_off0000d6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B1 5420 bytes
SHA-256: ffb8a79654b05f7b7fe60e22c0cdd06c2fc002ef2fc75e7d2968caf17ced68c2
font_01_sfnt_off0000e952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE952 12520 bytes
SHA-256: 9847c4d830e034c767d5ca26bf30056298b29594ab8d28fe1276db04e77a6165

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