Malicious PDF — malware analysis report

Static analysis result for SHA-256 ece2b7cd8ffc71c2…

MALICIOUS

PDF

65.0 KB Created: 2021-02-20 05:28:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 078145a2999e04688f6939bf165226e0 SHA-1: 0425dbdce048fecebfec1747dc9f77ced07f3d3f SHA-256: ece2b7cd8ffc71c27458a23ad8bff1a612ae18f7cf657e0427a98c5d958c1b68
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URLs that point to external websites, suggesting a phishing or credential harvesting attempt. The presence of PDF-specific heuristics further supports the malicious classification.

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://jacksth.ru/123?utm_term=toro+timecutter+cost
    • http://realnoe-obshenie.online/how_to_write_data_analysis_for_research_proposal9fvou.pdf
    • http://crysety.xyz/earn_to_die_1_unblockedmvd67.pdf
    • https://static.s123-cdn-static.com/uploads/4369663/normal_6006bcb2defd3.pdf
    • http://slamelina.website/335325802758opxs.pdf
    • https://static.s123-cdn-static.com/uploads/4374963/normal_5fc98a2d2893c.pdf
    • https://static.s123-cdn-static.com/uploads/4482617/normal_5fd085b7b2bd4.pdf
    • https://static.s123-cdn-static.com/uploads/4408323/normal_5fe1cfb036ce5.pdf
    • https://cdn-cms.f-static.net/uploads/4488581/normal_6023f26719e60.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://buwijakuwomem.rf.gd/bloons_tower_defence_4_free.pdf
    • http://lisudanuzi.epizy.com/downey_parks_and_recreation_guide.pdf
    • http://fudewalazakukug.epizy.com/brain_teaser_worksheets_for_highschool_students.pdf
    • http://zexenodu.rf.gd/2223228892.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3ca.bin
bb8785fff6de71ba4b3adec70ca045ca0e289eff0fa0bc58417691eb2444c9c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CA 4652 bytes
font_01_sfnt_off0000d388.bin
e0d8a101cf8a3eaf108619f08befacb062c20f83e8bf6f01d987af4f2884f98a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD388 10532 bytes

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