Malicious PDF — malware analysis report

Static analysis result for SHA-256 318288fadb50ea04…

MALICIOUS

PDF

99.8 KB Created: 2020-11-10 23:53:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c7b53e4fd8180d224b23fe2cbe02be15 SHA-1: 2e4f959b4da79022ffbe4512a6d4384aa297bde9 SHA-256: 318288fadb50ea0460ac292b5abbd132aa49d2ba5e804acf7a6b9f7778db5117
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://traffking.ru/123?keyword=the+faithful+executioner+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5fa39ae0c8d8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402951/normal_5f93a59798a42.pdfIn PDF document text
    • https://topodomero.weebly.com/uploads/1/3/2/6/132696018/4942541.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446773/normal_5f9d458924288.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/c54d30bc-37dc-424f-a2ad-113ace64464c/jakovadoraj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9e5b293-7d40-4467-9e5d-cc247eaa9653/keurig_k_compact_water_filter_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1af0fb07-d1d3-4dde-a989-9c5fc564ee15/stihl_fs_56_rc_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2464ba6e-f6b4-4b53-b6bf-99afb766f3fc/big_apple_dancesport.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4b2d42c-7286-4a41-b5b7-7fc89e893170/83016763239.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2db65e8d-f102-4031-b6dd-0a5d2d6aeaf8/toduxugezexanudu.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/90764779560.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df36baec-24d2-4f4a-8524-581ffaf87c22/chapter_9_fundamentals_of_genetics_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/676d9884-a84f-4950-9e72-e761bc4a2321/pojipefip.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/fedesezaferevusipipes.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

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13680 5080 bytes
SHA-256: f61051c9359b46e39135396037843dc8cc0a043445ac4ac2c8d80fe4b9a4f4f5
font_01_sfnt_off000147c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147C7 10800 bytes
SHA-256: 8f395bcbe0eed74e829da8bd0ae9b8430aa2339125f9942d337524c39708e6bf
font_02_sfnt_off00016c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C87 16188 bytes
SHA-256: f556fde67bc11cc16b003e9b57d953562b3481761f4ba7aaa2944500bf0acf23

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