Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6a5de02672d357…

MALICIOUS

PDF

65.8 KB Created: 2020-11-14 22:12:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5738082ddb5390253d723246952fd495 SHA-1: 7020866d7724102bd8736b2dadad9ef1ff3199de SHA-256: cd6a5de02672d357f0c5675d5cda9a58108a7f687d7eff68f4649fd364ead285
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-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://trafffi.ru/123?utm_term=watch+sao+2+english+dubbed PDF link annotation
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/ecea2be33.pdfIn PDF document text
    • https://sazaselofodufo.weebly.com/uploads/1/3/4/5/134590081/6122920.pdfIn PDF document text
    • https://fetibafavi.weebly.com/uploads/1/3/0/7/130776688/lowedi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390074/normal_5f9683f41ceeb.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/6ccea10e-e12a-4a33-9551-ba0d75a5e732/waxikiburavetipix.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/11089919247.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/23786301484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce7d92da-77c8-4901-a7cd-80a4c463b9bf/new_orleans_hoes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9de76c9-3665-48dc-b5d6-581848a69a55/msn_practicum_goals_and_objectives_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d79ad33-aa61-43fc-9331-4c05afc988e2/sujiterafezaju.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/egypt_newspaper_news_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/465c31a5-7f93-4fab-9cd4-61da084d938a/applebees_pay_stubs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30ecb574-48a1-4d1f-a9ad-cd484d0173e3/lagekemuv.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_off0000bd4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD4A 5388 bytes
SHA-256: 734d899d4864cb7721e0ae796d6dcbf721f54de97aba11f84bb9138d85ced2d0
font_01_sfnt_off0000cfa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA8 13252 bytes
SHA-256: 842b0e6472f8a312a04c356a217309ed879d7b67745e5a6b1b8344526adcb503

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