Malicious PDF — malware analysis report

Static analysis result for SHA-256 c668ca4e287ea5a1…

MALICIOUS

PDF

65.8 KB Created: 2020-11-24 18:03:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 275d19975da522b185d0b8aba104f9a4 SHA-1: 1f5ce33829ff4fda25a398587da27e937e954e85 SHA-256: c668ca4e287ea5a1695b4d14a304de5b5898f0ca2885fd893ede4508513e6420
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://trafffi.ru/aws?utm_term=biblia+de+estudio+pdf+descargar+gratis PDF link annotation
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/fejilar-gomijigujoxa.pdfIn PDF document text
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/a39b7e88f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366639/normal_5fb7fb20d1d42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502817/normal_5fae3d85c4b21.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/ecdb3626-ff8b-4999-8c8a-d0b0654983af/gozovumipexagusufajokodok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1068aedd-781d-40d1-804c-833dfee16ff1/xalexejonupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/812d5508-5a01-4cab-b99a-4c48fd90cbb3/67300414152.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b58c6dc-500d-47ea-8d0e-a058c8b0a8cc/nipafumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95632882-3ce9-4bb9-94d2-db788d64e9ca/59043325987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d949cd4-db32-4e73-b532-252c06d8e544/96643470503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce4694c8-8eb1-4e9b-81b1-9680e2cf99a6/understanding_the_bible_harris.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0a44b6d-ae41-4b07-90ff-a85e73569c6a/kutewuni.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ac49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC49 5512 bytes
SHA-256: 61a800e46bd891443a95b565df00932db582aa07b3e150639f69ccd178f28c90
font_01_sfnt_off0000bf11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF11 11332 bytes
SHA-256: c9864f94b570e5fe937eeefffa3b08944d09fb98ad02f627180e31d12d26556d
font_02_sfnt_off0000e3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AC 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073

Open this report in the interactive analyzer, or submit your own file for analysis.