Malicious PDF — malware analysis report

Static analysis result for SHA-256 9864071dcb50c7a3…

MALICIOUS

PDF

80.6 KB Created: 2021-03-13 22:08:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 757f105e27d0d0b7b58572590cdd7a69 SHA-1: 8d853cc2af22335a725e221fef5f079db5555d73 SHA-256: 9864071dcb50c7a303ed958908b803f902691e61f1439457ae05dc8b3eca9725
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier also identified it as malicious. The embedded URL points to a resource related to removing Android lock screens, suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs indicate it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/wix?keyword=android+lock+screen+removal+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4443342/normal_5ffe2ce0c414a.pdfIn PDF document text
    • http://mazikopipovix.mywebcommunity.org/how_to_reset_samsung_j7_software.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424683/normal_60354843e7c10.pdfIn PDF document text
    • https://pebevakulowuju.weebly.com/uploads/1/3/5/3/135323022/061deb9dc4f0c78.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/kriya_yoga_practice_book.pdfIn PDF document text
    • https://jetukuzimol.weebly.com/uploads/1/3/2/6/132695660/0c214d04a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422147/normal_603511e83ef64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369651/normal_5fdde6c7c34c7.pdfIn PDF document text
    • https://jobadenel.weebly.com/uploads/1/3/1/1/131164033/98d203ba995b232.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484375/normal_5ff936dd2d60a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501193/normal_5fcf52ea866c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505839/normal_5fedf4422c19f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454967/normal_60036d1f374cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392868/normal_5ffeb804adf9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369311/normal_6028e9f3779f8.pdfIn PDF document text
    • http://suzamajotibe.mywebcommunity.org/43051138174.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/2a4d0b7c-464e-4a20-b2ba-7cba7be884c2/92898072818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50c53ea7-2f12-4732-8544-508543090aa5/remington_model_552_bdl_speedmaster_review.pdfIn PDF document text
    • https://2e8e3215-33bf-4fe1-bc67-b38dac560527.filesusr.com/ugd/269bb8_afcb9fda1296458693a1a88d15b80de9.pdf?index=trueIn PDF document text
    • https://1347de4c-4e54-429a-b84c-372e60bc5a2b.filesusr.com/ugd/6c98bc_b3e6ce052c7f4a6d9034b0961719eaca.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d49c6da6-5754-4a61-a176-65cd0558eb20/48363880627.pdfIn PDF document text
    • https://0aa989e7-076c-475f-bc22-fff5ae310860.filesusr.com/ugd/b44be6_7419b1eb434d4cc89e8bf43820c3dc37.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0577ac3-79d9-4e79-90ef-de4771505c6b/best_data_analytics_software_tools.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24C 5332 bytes
SHA-256: 57350b74f635b32e1284764665d0badbb0dc8294642374fac5256bad688673f7
font_01_sfnt_off0000f461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF461 15060 bytes
SHA-256: 0d10ff3de4fd764078138902d32f68e3658fc5929bc7ea8563297b4f61fa8e45
font_02_sfnt_off00011f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F00 16204 bytes
SHA-256: eff505afb8e26c38bee6bcfe2a1fe7ec06ef672c1b18ea48f40a557974472291

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