Malicious PDF — malware analysis report

Static analysis result for SHA-256 17bf7854bad7beda…

MALICIOUS

PDF

67.3 KB Created: 2020-12-19 00:18:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6903a440b44507e51a5c519937203714 SHA-1: e7040fb8187dca6ebf97c370967afd2d73b3b1ce SHA-256: 17bf7854bad7bedaf2b12e9c63142614165dfd9b17f4f570bdf3b562821528f6
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains an embedded URL that points to a suspicious domain, identified by heuristics and ClamAV as malicious. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text that appears to be related to the URL, suggesting a phishing or malicious redirection attempt.

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/aws?utm_term=actor%2527+s+nightmare+script+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403282/normal_5f97a6188de10.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/f5d6691b-9c28-4034-913e-a6b710626920/stove_top_grilled_shrimp.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6ea2a10d6a92a7368d982/t/5fcb53f6a3bc3d19152caf92/1607160823708/zinavofokexuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a02edd2b-5534-43e8-8a1d-aeff0d908417/2295280690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11af2e0b-36d2-4cf0-8e67-4378306465fa/38141539084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e1511b8-cd1c-4ae7-a738-af0f8ae4dc56/drake_summer_16_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50c7c4ac-93d4-4ba4-bb89-a33fa16814b4/a_elite_kiera_cass_baixar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac1efe7d-6887-4df7-839f-977ff1b29485/komonoberelitapo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ea1940f1034a5ca8ddc5/t/5fc5a83ee6d49a06bb5692ab/1606789192981/79387737446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/039f790b-9eff-4a5e-9627-8ef2d70afaad/rovugunisap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/671c96ee-6886-496e-b69f-6715672b716f/watch_spectre_online_putlocker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78460c49-376f-4f62-ad08-75e807e34ab3/stochastic_processes_sheldon_m._ross.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_off0000c935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC935 5560 bytes
SHA-256: 21d7cefeeb007408bc26a3619ffadd6bde4a782d9cbd6fdd56df16bdb191c571
font_01_sfnt_off0000dbfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFC 10752 bytes
SHA-256: 8341bb44df7d6d6f72f437de023df5b33618a7007bfd690763f0bb57ba068550

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