Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2b2bc6c36cbdc4a…

MALICIOUS

PDF

286.7 KB Created: 2020-11-24 16:56:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 05510c7e526a42f89778a94632c88de6 SHA-1: c30014832b44e044ec20b54489185c662344ac27 SHA-256: f2b2bc6c36cbdc4a67ad462a99871b31ee4793169f4b30bcfb7aa762078211a8
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL pointing to a suspicious domain, likely used for phishing or to serve a secondary payload. The document body, though heavily obfuscated, suggests a lure related to a 'book pdf free'. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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=running+out+of+time+book+pdf+free PDF link annotation
    • https://jobipidamefoji.weebly.com/uploads/1/3/4/6/134696246/zegaruzoruti_boniramadezefi_lebafevuzakixu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417429/normal_5f9c22b9ede82.pdfIn PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/lusilataviludova.pdfIn PDF document text
    • https://pukaxixuzex.weebly.com/uploads/1/3/4/4/134492253/dupag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415531/normal_5fb4148f40caa.pdfIn PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/2092662795d09.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/bekabasuref-rexokaxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489422/normal_5faae6c92af55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393189/normal_5f93be683ade7.pdfIn PDF document text
    • https://vuvofazomegudej.weebly.com/uploads/1/3/4/3/134329778/4843e7852e584.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7ed1ea52-8d8a-4b10-8ad8-d9798c0045b2/kuzasetajitupesuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a95640d-efd7-4893-b347-73bda61b8677/vajimotepofesusijoniwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f71b00c-dde1-494e-ab3d-2ef8b33781ec/77176502107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ac1beda-9cd5-414e-a1d8-a855d2728f7a/belarozalumomeleji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8349f0b2-f937-4fbe-af1a-7081c93aad08/23756397783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd368c5e-7fb7-4003-ad32-0df99469572b/76310096239.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000424f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x424F9 5032 bytes
SHA-256: 3f3ec58f1f0fe1be9be8aa794343599681fa9ce378413795a523483fc69773f3
font_01_sfnt_off00043608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43608 11844 bytes
SHA-256: 4a33fc126ea6a8364eef638c0ae77169772420777018dbb9dd4731988578c357
font_02_sfnt_off00045e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45E06 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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