Malicious PDF — malware analysis report

Static analysis result for SHA-256 f88dada449b2bc12…

MALICIOUS

PDF

105.2 KB Created: 2021-02-18 06:42:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6a80c0e77eb9eea932e05e27d8f6ac3d SHA-1: e566123a654af75f89532f231482e844527a2114 SHA-256: f88dada449b2bc1293e25bdfe21372b9e30011dd9a5ce698f8ce65eac1ab457f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a URL that appears to be a search result for software setup. This, combined with the ML classifier and ClamAV detection, suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to software and PDF creation, which could be part of a lure.

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://bologen.ru/wb?keyword=sound%20blaster%20z%20software%20setup PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4479439/normal_5fe0e93a87917.pdfIn PDF document text
    • http://hotsgirls.online/como_recargar_a_cuba_desde_mexicoqnjo1.pdfIn PDF document text
    • http://zuzitijimopa.22web.org/autocad_manual_book.pdfIn PDF document text
    • http://psylath.com/4225258710wmfec.pdfIn PDF document text
    • http://4kuhd.me/gigijibezogale8fj4.pdfIn PDF document text
    • http://allerop.xyz/nivotokitujumigufituqznr8.pdfIn PDF document text
    • http://fogonoruso.iblogger.org/how_to_not_be_an_average_guy.pdfIn PDF document text
    • http://circulyarkadigital.xyz/macmillan_english_worksheets_for_grade_56djvf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475727/normal_5fdfd611a2c1d.pdfIn PDF document text
    • http://meboxofunufox.iblogger.org/22652591103.pdfIn PDF document text
    • http://brosbass.com/3833509138725qrm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://godutugogusapa.rf.gd/lixuwavabepugal.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/37647801753.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/67411528578.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/53010891038.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/c_n_rasio_tanah.pdfIn PDF document text
    • http://mevonaku.rf.gd/dinotrux_coloring_sheets.pdfIn PDF document text
    • http://rawozenagi.epizy.com/apx_pulsar_vaporizer_manual.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_off00015d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D7E 5420 bytes
SHA-256: 82d6fd10929f4862661753d831b68de9fd4f3a4beb1a1e91d72eedfe7a7d86bf
font_01_sfnt_off0001700d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1700D 11360 bytes
SHA-256: 5e32acadd98d466f6ddaaf6d238eed9dbd4bf8930158a08af5a15b9a4ba3fd78

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