Malicious PDF — malware analysis report

Static analysis result for SHA-256 d10a9770d981b927…

MALICIOUS

PDF

89.1 KB Created: 2020-11-18 06:12:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 12d188ddd0d8a0a8428ab46493e6e170 SHA-1: 96661249f41c388d278ef201b71f74dc4aaa5e67 SHA-256: d10a9770d981b927cd455918ac28e73a79d01ac271db89f3cf18e59bac17f071
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 0.9993

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/strik?utm_term=rosewill+usb+3.+0+driver PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377400/normal_5f8a0ac3ab674.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390637/normal_5f9ef8116152a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5fa956fbd74e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369138/normal_5f90b1f935d63.pdfIn PDF document text
    • https://molisemopum.weebly.com/uploads/1/3/1/4/131437834/bamunaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412573/normal_5f9d7f6134f5a.pdfIn PDF document text
    • https://xoforovujedopod.weebly.com/uploads/1/3/4/5/134587448/5211615.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/c10abd2e-cb9e-42d9-a04c-f041f47a3803/kanuxuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43ee9750-7698-4bac-8ae2-234230bb56fa/namofevusidoro.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/kagubow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/224a9636-dd89-495d-8fee-785d0f06f59b/woods_runner_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zokokamu/82095319852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a0bb083-47d4-4048-b1c7-85ad10f9b213/vantagens_e_desvantagens_dos_direito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02451cea-1c4c-45a3-bbfe-0f41078e682e/mizibararupa.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ece8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE8 4940 bytes
SHA-256: 77e8a90fb86ca064e4ae7a74d5aa3ee49727a300df7196a76a44a3f89a3a2804
font_01_sfnt_off0000fdc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC5 2844 bytes
SHA-256: 8f6557963471db4c7f2b603c47e14062b5a06ecc87e6a321cdccdfc5b999dbcc
font_02_sfnt_off00010989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10989 10640 bytes
SHA-256: 3c4227c9caaa6c6a4a77c0c3bf36a2d8f302f33866680b154542d76ab13449bf
font_03_sfnt_off00012dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAD 17936 bytes
SHA-256: 2aa8127cb395bad8cbeafeb6be538ba0d2ddea61fd39a7f54245b8922f22bfad
font_04_sfnt_off00014894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14894 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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