Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cff10883db5c78c…

MALICIOUS

PDF

71.0 KB Created: 2020-11-18 02:44:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 866e787eee7b22b13c5415e2879adcdb SHA-1: 1ed0cb5cff2a4a359079eca0970d32711c5ddca7 SHA-256: 8cff10883db5c78c510dad664f0678dba612da4aadabd5b51495627d4ac572ca
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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://traffset.ru/123?utm_term=the+silent+weapons+document PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367920/normal_5f887644d08e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476437/normal_5fa6d02c7fe7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371508/normal_5f9ec45b9f84d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368972/normal_5f959757dec51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403266/normal_5fae9c1466416.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369313/normal_5faf60d1e2141.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5fa984a741c29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453537/normal_5fa03789af3cd.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/7df340a6-da51-4841-9f60-5f1a99c4a516/beluzenebeti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b452d66e-2f31-463f-bb3a-858767b9d6e8/5135709790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b1f7469-1b35-4ce5-949b-3871f8ea08f9/download_photoshop_cs5_crack_keygen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bca9be9-635e-4848-a6b2-1a4da69dd1f5/taniwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33531574-ce3d-4387-a953-cd3be5bbb7fa/leguvalejinagopu.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_off0000d698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD698 5256 bytes
SHA-256: 438dc45aadd6d86103b7181a8defecf8489817b0cf60ff8f16d1835e72f5a03b
font_01_sfnt_off0000e869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE869 11592 bytes
SHA-256: 2d6176e31496dd10d072813a07f0ee536deba3991827f48c013c7cd927a3de15

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