Malicious PDF — malware analysis report

Static analysis result for SHA-256 18267cac6b84e206…

MALICIOUS

PDF

64.0 KB Created: 2020-12-18 02:05:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ace33c75715da3c286a0a85e7c05578c SHA-1: 90e40b783ef894ebe4eb8e41ea3bb2837c712832 SHA-256: 18267cac6b84e206d99e9b85673639e4f27a9224be0c61e0dfe6c88cb8d9188b
104 Risk Score

Malware Insights

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

The file is classified as malicious by ML and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'traffset.ru' suggests a phishing or command-and-control communication attempt. Although no specific script content was extracted, the 'SE_URGENCY_LURE' heuristic suggests the document's content is designed to prompt immediate action from the user, a common tactic in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffset.ru/aws?utm_term=rcog+guidelines+for+pph PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447267/normal_5fd7cea5d5090.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/5a245cad-bd6f-4cf5-b493-306740e67b83/16643926307.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18272ff13940aa243ecad/t/5fc55928f8cdb769c695ad96/1606768946229/20859870727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89305149-3de7-4bd4-8fa6-5fee7dfb69f0/dicionario_yoruba_portugues.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/194e6df3-da2f-412d-be79-bb01087b5f8d/kinobody_superhero_bulk.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/97917261303.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0de27085bf90c0efce9ba/t/5fc52b8461e25426e1de5194/1606757253741/14705430188.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/critical_injury_report_form_ontario.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/bewupaguw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da4aae93-1f98-46da-9ac0-65b4ed4e897e/mavaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/860e296e-0e6f-4323-9f3b-c686cda6d267/vinesoludobaxalolukewuwu.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/bbs_format_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/xivimusebavivonovatuses.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/zukofawefamanesobaxuxez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/025aebfb-a65f-4012-98a5-7f5b42149133/kun_anta_mp3_versi_indonesia.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD7B 5212 bytes
SHA-256: d99217a3c8fff899e985321e0363c466a65651212d35615c7e0755b44405e734
font_01_sfnt_off0000bf3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF3D 9120 bytes
SHA-256: 463bcb56295db34dd7f9dc59fd1b6a2393251962a19603b2672d0fc85cbaa56a
font_02_sfnt_off0000de8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8A 16060 bytes
SHA-256: 503f5200e83b189a546b6c6e1d808633a9135186956fe76ff9bd78de3d91e3c6

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