Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f6f797af64161e0…

MALICIOUS

PDF

81.3 KB Created: 2021-03-28 08:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34da3757432fb1ada7790a5ebcb2f6d6 SHA-1: 22390477206ff76a9437e7b2b1eb1ff52ed0fa4d SHA-256: 7f6f797af64161e07f5950fcb8e39eb7e05b0db7cdf4e957b0f8235e266a5812
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains text suggesting it is a summary of 'Pride and Prejudice', a common lure for phishing or malware delivery. The presence of an external URI pointing to 'jumiwimov.ru' strongly suggests the document is designed to redirect the user to a malicious site, likely for further exploitation or payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/strik?utm_term=pride+and+prejudice+chapter+11-14+summary
    • https://cdn-cms.f-static.net/uploads/4387226/normal_603758b34558e.pdf
    • https://static.s123-cdn-static.com/uploads/4372963/normal_5fdff1a1e8454.pdf
    • https://cdn-cms.f-static.net/uploads/4409602/normal_600aacdf1b5b3.pdf
    • https://cdn-cms.f-static.net/uploads/4443819/normal_6059a60b8c6a6.pdf
    • https://cdn-cms.f-static.net/uploads/4388421/normal_600cb4d9bde63.pdf
    • https://cdn-cms.f-static.net/uploads/4383147/normal_5fe81f8b5a116.pdf
    • https://cdn-cms.f-static.net/uploads/4389804/normal_6057fab10a1fe.pdf
    • https://cdn-cms.f-static.net/uploads/4486193/normal_6040e3ae37d88.pdf
    • https://cdn-cms.f-static.net/uploads/4450415/normal_60338b8c7521e.pdf
    • https://static.s123-cdn-static.com/uploads/4392877/normal_5fee9e0781bc6.pdf
    • https://static.s123-cdn-static.com/uploads/4495390/normal_5ff1c934206e5.pdf
    • https://cdn-cms.f-static.net/uploads/4371014/normal_6024f73954cf0.pdf
    • http://volomowoxe.22web.org/74573096616.pdf
    • https://cdn-cms.f-static.net/uploads/4383138/normal_603412353bc4f.pdf
    • https://cdn-cms.f-static.net/uploads/4489980/normal_605b1cd3d358f.pdf
    • https://cdn-cms.f-static.net/uploads/4502436/normal_603a2abb569a2.pdf
    • https://static.s123-cdn-static.com/uploads/4426697/normal_5fdd7a68d8aad.pdf
    • https://static.s123-cdn-static.com/uploads/4426063/normal_5fe50b717b9f7.pdf
    • http://jupulapigivux.22web.org/79294294542.pdf
    • https://static.s123-cdn-static.com/uploads/4374022/normal_5ffa94f53b10a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nasuxenabo.epizy.com/nepud.pdf
    • http://bividit.rf.gd/aegan_tamil_movie_free_in_utorrent.pdf
    • http://nibatozov.epizy.com/creative_writing_topics_for_grade_4.pdf
    • http://bataxob.rf.gd/gewiku.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_off00010267.bin
34f849ab4e1286831986653a2b48c65f3e17c8511847de42e7db322a6e3146a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10267 5632 bytes
font_01_sfnt_off00011583.bin
2c29503248da2151cc5dd69068e329b077292819139b46d5d04e8ba124f6689c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11583 9984 bytes

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