Malicious PDF — malware analysis report

Static analysis result for SHA-256 112f323a15bba30b…

MALICIOUS

PDF

65.5 KB Created: 2020-11-17 22:51:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: dc81411a49df74a405a0334994466cd3 SHA-1: de042be91064cbfda80710532a39e5c00c4b3361 SHA-256: 112f323a15bba30b2d17e542449524c2b87371c9d78b45d7cc1924075064f20c
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 0.9998

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://trafffe.ru/strik?utm_term=dcf+child+care+training+practice+test PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451940/normal_5fa055bd71ef7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f8a8a8e4c135.pdfIn PDF document text
    • https://bujibapi.weebly.com/uploads/1/3/4/3/134383234/df5578c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413373/normal_5f9bad22ce89d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426945/normal_5f9a71e06b6fc.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/tifuwuw/kazogabikugonubobivat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/665e9346-b479-4de7-b39d-b522e36f76f2/bujoxamezikemujevoxokosew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a3df0b7-be46-452b-be24-7beac3c9a203/exercice_aire_et_primtre_5me.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/zumopitegewufitupon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68558a4e-2de2-40a4-99b6-a3edf8512cb1/47415502970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa4dcc16-79ab-4364-98c6-86ff563f7433/xokosafum.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_off0000bff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFF7 5416 bytes
SHA-256: ac7665b40ab358e3bdf5a36be682451bb751b228d15b2518490da13e7463f530
font_01_sfnt_off0000d267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD267 11604 bytes
SHA-256: aca8b09df9b5bbecee24cc8c94cda405297ba3cabe3fa7a6b7507fc0cdb6ec3b