Malicious PDF — malware analysis report

Static analysis result for SHA-256 c100e21303c05a89…

MALICIOUS

PDF

61.1 KB Created: 2020-11-18 07:30:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 301fabcbdf02fb63915557340c949674 SHA-1: 9b3ed563e2c68164a108ebdf2311252dd6571a9e SHA-256: c100e21303c05a894f146d14f66adf47f2063f543c882421f686f75630bfa0eb
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-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://trafffe.ru/123?utm_term=new+riegel+schools+staff+directory PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383160/normal_5fa646707dbd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f876d0f19fd7.pdfIn PDF document text
    • https://gazubulurogul.weebly.com/uploads/1/3/4/4/134493330/lefirixan.pdfIn PDF document text
    • https://tanaxigurav.weebly.com/uploads/1/3/4/2/134266775/5476235.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380682/normal_5f903e12a6583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372373/normal_5f949f28d6723.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476750/normal_5faefd334f27c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421056/normal_5f9d202671424.pdfIn PDF document text
    • https://gewedawinun.weebly.com/uploads/1/3/4/7/134745389/wulodeze-tizusukamawetat-satana.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/dbd5267b-97c3-4c26-ae7c-e7b56f89f0b7/acdsee_crack_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d1369ed-921f-413e-bded-e7640a55d04d/george_foreman_evolve_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42c6be75-0980-4b0b-9260-426ba1bba85e/raredepiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d486074-98f0-4716-b15e-fedf58241d77/gsm_module_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f2fc6cc-0acb-47fa-84b6-f30f609faa16/bavogamopuxowonoloxani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55821ac1-95bb-4156-a860-5337c7413c71/musicians_friends_wiki.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB099 5444 bytes
SHA-256: 630bb13fcbf3a94262ec7be497032eb2a77e038efcd62e6ae5a93fbc2ae824b5
font_01_sfnt_off0000c33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC33B 10684 bytes
SHA-256: 181db4b03621ecf300fbc73ccc6b395a82d978d148a2469261da5cd413a7e0fb

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