Malicious PDF — malware analysis report

Static analysis result for SHA-256 baeb24be218c6c03…

MALICIOUS

PDF

71.4 KB Created: 2021-06-05 07:40:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b8bde8f93fad370c2ea337c5f106d5b2 SHA-1: c626957b5ddf1b22c5163b5fe9c7d65b40bde8d7 SHA-256: baeb24be218c6c03b4c3e4ce685fb904497dbb84a2b1296340e4a8e3dd4ecb01
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'wastran.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be related to the 'Barney and friends theme song remix' and the authoring application suggests it was generated by wkhtmltopdf, potentially as part of a social engineering lure.

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://wastran.ru/pbw?utm_term=barney+and+friends+theme+song+remix PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501054/normal_604e90d618990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475875/normal_5fda56781940c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402261/normal_60413bfc37f52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424632/normal_602a3d7114583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426686/normal_605ee2ec640b6.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/70330704-9e5d-4a87-9d57-eadca1b7fc17/i_got_some_sunshine_in_my_pocket_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/393b419a-0568-411e-a91a-506fd2f4c569/22424951853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f18a73ca-a6cb-4aa5-8811-e5c6d1854968/autocad_commands_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/175f1e7f-6738-40b7-ac4a-c6e6d18abfa8/basuwolor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c5fc602-0787-4d70-a98d-02a263e1abac/make_a_list_of_worksheets_in_excel.pdfIn PDF document text
    • http://sodopateduke.pbworks.com/w/file/fetch/144426555/55552745403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2518d23-c722-48b0-9598-c963ef6fd2a1/fujik.pdfIn PDF document text
    • http://vasoxekisede.pbworks.com/f/is_2021_good_for_capricorn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6dc2f56-2d4e-4e32-bfe5-2f22581bda76/mecnica_vectorial_para_ingenieros_dinmica_11_edicin_solucionario.pdfIn PDF document text
    • http://lekuzax.pbworks.com/w/file/fetch/144412008/abstract_painting_concepts_and_techniques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa255c16-f0f6-4ff7-ba9a-3fbd6b26519c/86506028084.pdfIn PDF document text
    • http://ziludezubeju.pbworks.com/w/file/fetch/144459003/8799569108.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_off0000d888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD888 5508 bytes
SHA-256: 975debfd0cb57b8f020f2dad9d703fe484ccf069e690c9901e98dd760aece277
font_01_sfnt_off0000eb2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2F 11380 bytes
SHA-256: dd24f831ec5235129016aa4325653ba37f14d1185382f8b7daf3781ae53ce1c9

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