Malicious PDF — malware analysis report

Static analysis result for SHA-256 71070de0599fcd85…

MALICIOUS

PDF

287.7 KB Created: 2021-05-26 05:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 08ab2d67d00b4215cb76beb9e3fc814f SHA-1: cfb7cc86ef9ba4d97f8334ae73cacb006c653d73 SHA-256: 71070de0599fcd85fd61672770baf5076d67f190276f564672a9fade76fd9849
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious URL, likely intended to trick the user into visiting a malicious site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the malicious URL and the detection signatures strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://botokaw.ru/strik?utm_term=corazon+salvaje+capitulo+59+completo+%25281993%2529 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488330/normal_603e7589ecc42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411229/normal_5fdd5f6ed077b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388183/normal_5fd6f28114239.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403946/normal_6000a25d68af5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471513/normal_5fdbbea71f47d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413835/normal_60015692b9b73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481515/normal_604d37b66a783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5fe8cd2358fe1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477913/normal_60579ebdae4bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418197/normal_6001fa4724c99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488582/normal_5fda124d3ff41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461245/normal_606b282dbc2d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393348/normal_5fdebf397c399.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/jazuravazaguz/dogoribilulurujodufi.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/gesoresegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bec42c5-8507-4451-aea8-cc1f1f2a6ecd/remove_norton_safe_search_from_google_chrome.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/autocad_lisp_programming.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/42499344136.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/fobivaj.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/full_body_workout_app_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17e027aa-6e45-44e9-bde7-36abe780b6a1/91952936507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19b696c4-b73a-4bb8-b7b4-44bd6efff835/the_7_spiritual_laws_of_success_download.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_off0004303b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4303B 5820 bytes
SHA-256: be51cdddb60003485158aca8f3d32f3871c5cff69410f8eaf0930d5fbf230ca7
font_01_sfnt_off0004441d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4441D 13600 bytes
SHA-256: 4b8e70fcf75d0a64a5e03d5f830ea0f271029590147ddf3d0c3465626fff266b

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