Malicious PDF — malware analysis report

Static analysis result for SHA-256 67652826c9f4bb63…

MALICIOUS

PDF

78.0 KB Created: 2020-12-15 03:54:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 619ae79f355ec1f52e0ee162b9bcc273 SHA-1: 93c57ea25373a5e6ce4eed79fbe8914c1d1d7148 SHA-256: 67652826c9f4bb63b8218b0233ae4c878143b2e77cc173a9fc38ccdfa692e9e4
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://trafficel.ru/123?utm_term=classic+wow+stats+enchant PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4488332/normal_5fc68575d9b1d.pdfIn PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/regutoxutavi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386594/normal_5fbe40bfb5ecd.pdfIn PDF document text
    • https://menegelobeka.weebly.com/uploads/1/3/4/9/134903334/739454.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/roware/22210424592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8398d16-5051-4ef2-82b9-a997a96ea8a8/52522678616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b419df48-e991-4f52-b41f-80b8bbfadff8/99120156624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4572e574-b249-4878-a53d-b1a5e50f0b13/becker_schools_facebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00705bdd-7e97-46e2-8057-240175c891df/50058211519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fbe8780-bfd7-430c-b60a-a043b7472459/chronicles_of_narnia_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53d6850f-6409-41ea-9b2c-b07d2e2c588e/kavowudegubadarerunarolag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb5890f6-dc4a-4b31-bcf4-82a74865fccb/timewudejig.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc556e688c99b6d37c4d50e/t/5fca407c8d0ac92c7bedc736/1607090301382/tumikorinef.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CD 4788 bytes
SHA-256: 7a5bfe22d728b288f88fb348226666e28e64abb9c2ecf64275533842b5a3bfae
font_01_sfnt_off0000d717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD717 13456 bytes
SHA-256: 8867085d8ae6f04cfdaca52062f2a7da9cd94f84684e2453a8bf9fca35feb466
font_02_sfnt_off0000fcb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB4 13928 bytes
SHA-256: a653b442d713f742d2add8b4753a5671cb98790b8f4b7afcf7546bce9e6d53f2

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