Malicious PDF — malware analysis report

Static analysis result for SHA-256 150cf341e876ce18…

MALICIOUS

PDF

74.8 KB Created: 2020-12-26 23:02:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 638826b2a765f290a8ab575513248c6f SHA-1: e01dd0a1db393533457730c760ebf1c1385c9755 SHA-256: 150cf341e876ce185e5d96e8b4b5b0f2a8d8130c353a4ef76bf503a612d02e71
214 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to known malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a 'Jaguar ringtone download' lure. The presence of numerous external PDF links also suggests a link farm or SEO manipulation tactic. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/strik?utm_term=jaguar+ringtone+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5f8708d6460b7.pdfIn PDF document text
    • https://cdn.sqhk.co/babakobesuxe/CIgfg0N/manifitakaxadepowegape.pdfIn PDF document text
    • https://mamamusesutur.weebly.com/uploads/1/3/4/3/134359404/5342089.pdfIn PDF document text
    • https://tuxibefogeja.weebly.com/uploads/1/3/4/3/134359070/ec87c9839.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekata/hfhgkqT/30149545059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407066/normal_5f93adcbefef5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/36517936759.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ca9fe6f-f9d7-45bd-9296-d231da6714dd/roosevelt_new_deal_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/36074106903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a459a7b-4e88-4835-a536-b9efd142371c/posejilapaworiga.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/bsm_course_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/zedof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bc51c68-aa0a-41b2-9b4f-a9f3004f58ae/porir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05c6686f-6911-4c79-b051-34d289b57b16/program_coordinator_job_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/35584351247.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_off0000ea5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5B 4896 bytes
SHA-256: d9cc1628d6c3a0bb21cf646d73f3a0e3e1a1bed2df8dd0c293d86ae9258c243d
font_01_sfnt_off0000fb26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB26 10432 bytes
SHA-256: 1cdbaa0ba09ffca10776e8ddf2ef1d8c37acebcc33e2a6633ee56818f19babf0

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