Malicious PDF — malware analysis report

Static analysis result for SHA-256 56469cf94d4d45db…

MALICIOUS

PDF

70.4 KB Created: 2020-12-02 17:48:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e99e6cf890ba680568479890c2190c20 SHA-1: 974bff88ab3cf2904078e1341cf030a648871f50 SHA-256: 56469cf94d4d45db4562874be200b08369c6efa951a0b2f326c30916ee63145c
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://trafficel.ru/123?utm_term=generator+load+bank+testing+checklist+sample PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385848/normal_5faacdae47c8f.pdfIn PDF document text
    • https://bilewobadazape.weebly.com/uploads/1/3/2/6/132695578/8746776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482854/normal_5fb9db556a5bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447101/normal_5fb84a5b46a26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466161/normal_5fbf3fb1db739.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/5fc10620bf71053ccb10dd13/t/5fc244eff8cdb769c62e223a/1606567156270/basher_oceans_11_gif.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfa749d104e5f152da6dd/1606220416900/68495447014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3769ead-721f-4ba3-96e7-ceb599a9f4ec/vipuvemosodij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ced4b016-b7ee-4dc8-9c76-da904d175eb7/84525413209.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/62558616104.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc56d9988c99b6d37c5c202/t/5fc7763ca907d7439cdbf15c/1606907452910/gorozonogurisasog.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_off0000d712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD712 5724 bytes
SHA-256: 8c5e42fd11d5593a2ae1d4ad6e632b301eeb2cca10a152fce2e43e6aaba0ae8f
font_01_sfnt_off0000ea5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5E 10164 bytes
SHA-256: 14eb3e4ee91e9df90bc6d025735b74a3269785b1028e21e5273dd39de79589c3

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