Malicious PDF — malware analysis report

Static analysis result for SHA-256 7239a1c12ddbb593…

MALICIOUS

PDF

73.3 KB Created: 2021-05-30 06:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1db11cf42b7467225651b43c746449dc SHA-1: aaf07fefe8171eaa78db9dbe02d2fc0ddc7fc713 SHA-256: 7239a1c12ddbb5935a578fbcdda1abc046424f2a60ea8dbba06834ba8efd4278
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, with a specific focus on a link farm, suggesting an attempt to direct users to potentially harmful websites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or trojan delivery scenario.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/123?utm_term=reportar+alumbrado+publico+morelia PDF link annotation
    • https://rugulobasogaje.weebly.com/uploads/1/3/4/7/134770789/dolabogawager_jipedide_tomekutowuxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454668/normal_60400ab73d861.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468827/normal_603341ef4b029.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450504/normal_604a3ea8105b4.pdfIn PDF document text
    • https://zopoxetofosifa.weebly.com/uploads/1/3/4/8/134863155/pubuzevonunata.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4391037/normal_60b302ef54267.pdfIn PDF document text
    • https://nebunabimumebu.weebly.com/uploads/1/3/4/4/134480995/2039578.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/bafeafcc-ca8b-4210-993a-04aeb7894ec7/42785617507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c28e6dd-7636-48ae-b324-35d86618f39c/hamlet_act_2_scene_3_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/415d6721-6d12-4a75-8c77-c01f4b7fdcfe/18983985762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d25f0956-2126-4d2d-8406-d7f523b8400c/learn_python_3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/965dfe79-8681-447f-878c-379e5366f560/jinigenaligekis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcc06ec9-5288-4400-863a-76c3dec54afc/26886075940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1f7f932-cd74-4e9a-a400-f333ec68cbcb/99671088765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbc036be-75c2-4600-8c1a-5b7cd3719476/23528641016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f884cf73-6294-4a69-9946-68ae5b769ddd/17312623079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fa520e8-6edc-4c98-81d5-18f89be008c5/bakowejisolat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed695a6a-1336-4829-a3c2-e74e4c04855f/which_is_best_oil_filled_radiator_or_convection_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b88f196e-174f-48ab-bef8-26fed2819686/panasonic_kx_tes824_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82d9bf9b-efce-470b-b92b-78acbc5cd8fb/ice_breakers_duo_mints_bulk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fac36ba-9c62-41a9-9d60-83cdbd7a5045/98860480629.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8434c2f4-49f9-4c46-a0d5-a877e851455e/67387450202.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF94 5188 bytes
SHA-256: ace1227b354142f3dcec17310a346068360cb8cb48fb85c7889d4c2ec2ebd6f6
font_01_sfnt_off0000f11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11C 11316 bytes
SHA-256: b759bc976bf49b81a989ee6243459e8d4963081880665ebc613d02fddf6284ba

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