Malicious PDF — malware analysis report

Static analysis result for SHA-256 10116ecaf036c0db…

MALICIOUS

PDF

61.5 KB Created: 2020-11-26 10:40:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9a96de39c95ef2224f6cfa73b60985b3 SHA-1: 91c672dfbc044d4503b091cb925a6f38121216e5 SHA-256: 10116ecaf036c0db08c3c6096949fc2409790bb735ae94f7d30544e304d2b2c8
96 Risk Score

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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=fundamentos+de+enfermeria+pdf+margarita+alba+hernandez PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393353/normal_5fbd849e2c61c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4526930/normal_5fb73cfe1e17e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f9974be716e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f8d72a5087d5.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/wuniku/78451925867.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/levepe.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/loluluporubuxez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67312440-fb40-4e49-85d3-2bfc0ba1f83c/40189340278.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d20bbbd-5c6d-45e3-9798-f69adfac7d8d/champion_spark_plugs_catalog.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/xubiji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/522ff698-d575-4152-8d56-c432fe343eba/gamuzob.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/arcadia_silk_plantation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9196e758-30b1-4306-88fe-92436b61f85e/singapore_math_olympiad_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b64df46-a23c-4cd4-bf11-7ec720b2931f/suvadabedazig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a665f2b5-ce1e-4a45-975d-884f19ed7e01/merge_dragons_challenge_33.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_off0000af6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF6F 5600 bytes
SHA-256: 3e46545f7b27642aa610fe705550c4c7fbf32791b864a790b4e326d05bb7d2bf
font_01_sfnt_off0000c258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC258 11112 bytes
SHA-256: addc9db79524c38cad08e2dcb4fe83ee2dc834790893e11a3bbe798d7b358dab