Malicious PDF — malware analysis report

Static analysis result for SHA-256 11fec2fc2bf53ff1…

MALICIOUS

PDF

70.6 KB Created: 2020-12-08 11:40:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b7a098fc2992c4b9c3aacd5f8e0342fb SHA-1: 92457bfc81b7c7fca9633bd26c222abe24daddfd SHA-256: 11fec2fc2bf53ff11a7c62620890e0d75c8ea714416b76e90cbb54be951899b3
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=mod+configuration+menu+not+showing+up PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389604/normal_5fbd3d3246c91.pdfIn PDF document text
    • https://purapunebofo.weebly.com/uploads/1/3/4/8/134888030/tapuwawap.pdfIn PDF document text
    • https://dimejozetef.weebly.com/uploads/1/3/1/0/131070151/3376177.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476135/normal_5fb8f81cb80c9.pdfIn PDF document text
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/furuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487658/normal_5faa56331c0e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419846/normal_5fb4ae1c695ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5f99079335017.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/posufij/13081413815.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb48ab49-3ab7-4cf2-ae71-1883d69dc9e0/wibemopafizosegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d011d81-a44c-4150-8b5e-943adadbd818/tugut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7c204a5-dea3-4557-9b30-eb9b9aa2ab1e/wafalebujora.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/38266831828.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/25936715993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f9e2e68-4d8b-484f-9427-caad85a7ab46/tojuxujijunokugipak.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_off0000c7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FD 5516 bytes
SHA-256: 7be3370fb00a078844b869912cb3b973faa801458a0864ff6ce7e7e6c40018df
font_01_sfnt_off0000daa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA6 10900 bytes
SHA-256: 253f2ffc779a06cfa59dc59466e90d21b3bff9f06164a2e226ace2f467987a51
font_02_sfnt_off0000ff6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6A 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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