Malicious PDF — malware analysis report

Static analysis result for SHA-256 b992d225260d722b…

MALICIOUS

PDF

72.4 KB Created: 2020-11-24 17:44:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 1dd3336cae876aac07cc5c5ee95b5fb9 SHA-1: da594d8e1ed7382cd6ddfe0662931d53de112f9c SHA-256: b992d225260d722b21767382010fe55679433ab56636ed9b69437f3d6412a7d4
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/strik?utm_term=chapter+20+testing+hypotheses+about+proportions+answers PDF link annotation
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/radel.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/rabaxabatire.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/8500162.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/320dda83-549d-40f1-ad83-e30a5e07f548/telecharger_tableau_conjugaison_angl.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/evaluation_feedback_form_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/microsoft_az-_100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bbaf9bc-da3d-4d93-bf1d-5a7390fbac9a/salafu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d2ddf10-e37a-4ab1-9d1f-7cf8ff6108df/koniwiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/581f9e93-0bfb-4f8b-932b-36e37a314672/rocketfish_micro_bluetooth_usb_adapter_driver_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb69f8e1-9789-464e-9c55-b5336317a617/11262279860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8290cd7b-fc2b-4cbf-b4e0-41c3c72d612d/42051189119.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 1

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_off0000ceab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAB 5564 bytes
SHA-256: f7b98219acd3baf1865bbea8b91956045dcf9d8a4cb4f984d647923e60425ec8
font_01_sfnt_off0000e1a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A6 10320 bytes
SHA-256: efb06714a17f3c7aa6492ae5477e1d17255863936d7e1d386e4bbea82d10d4c6
font_02_sfnt_off000104a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A0 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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