Malicious PDF — malware analysis report

Static analysis result for SHA-256 5053895ba2807c39…

MALICIOUS

PDF

261.9 KB Created: 2020-11-16 18:12:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 546cdf84d29d5ba4e29d426566574c5f SHA-1: 1653ea46398ca8b9e5773b6c226a25ccf88623f9 SHA-256: 5053895ba2807c39cbb0984e8a02af3c103369e62012ee33c6903512e4bb08aa
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. An external URI was found embedded within the document, pointing to 'https://traffnew.ru/123?utm_term=best+crossbow+materials+tinkers+construct'. This URL is likely used to deliver a malicious payload or conduct phishing activities. No scripts were extracted, but the presence of the embedded URL strongly suggests a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://traffnew.ru/123?utm_term=best+crossbow+materials+tinkers+construct
    • https://cdn-cms.f-static.net/uploads/4415962/normal_5f9da7b38f13f.pdf
    • https://cdn-cms.f-static.net/uploads/4391001/normal_5fa6aee73fd2e.pdf
    • https://cdn-cms.f-static.net/uploads/4414852/normal_5faed138718fc.pdf
    • https://cdn-cms.f-static.net/uploads/4384299/normal_5f8e4c090cd94.pdf
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f98d6531b9d3.pdf
    • https://cdn-cms.f-static.net/uploads/4381978/normal_5f9719f39a785.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fomaralunex/shark_nv_500_series_parts.pdf
    • https://uploads.strikinglycdn.com/files/0647633b-d82e-4e14-9c04-fd0300cc1e6c/representao_porta_correr_planta_baixa.pdf
    • https://s3.amazonaws.com/suzixegazunow/leupold_mojave_hd_pro_guide.pdf
    • https://s3.amazonaws.com/boxalewijim/akaike_information_criterion_1974.pdf
    • https://uploads.strikinglycdn.com/files/743e94d4-17ec-41d7-9470-7625c3ff19b5/tanarabafebofosokowov.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_off0003cd53.bin
11e46f9d1508a572b838a30203a8d5ce1f440ca9138bc62571adf2251ded261a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3CD53 5288 bytes
font_01_sfnt_off0003df4f.bin
ba16e2daec64e8636306b929e5e602f5373b4c10ba32493638a1ea95eb9f9686		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3DF4F 13148 bytes

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