Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5f676d9db94472f…

MALICIOUS

PDF

148.8 KB Created: 2021-03-17 08:48:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 35e794074ce95a14d01c54b3e35bc6be SHA-1: 53a246bfc358f7cccbdc466762c8459178eb79a0 SHA-256: c5f676d9db94472fd716403603c2233da101dea4422acf63847922d092a410a7
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL designed to trick users into visiting a malicious website. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URI are sufficient to infer a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/award?keyword=beidou+navigation+satellite+system+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4404515/normal_5ffd7127517d8.pdfIn PDF document text
    • https://jowujutaxafekul.weebly.com/uploads/1/3/5/3/135348014/fovutejakagazomusovu.pdfIn PDF document text
    • https://vanasukir.weebly.com/uploads/1/3/2/8/132815930/0322f1a1c9ff.pdfIn PDF document text
    • https://ziriponu.weebly.com/uploads/1/3/2/6/132696112/cfdbf664bebfd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490266/normal_6037ec9c922e0.pdfIn PDF document text
    • https://vedewoxid.weebly.com/uploads/1/3/0/7/130738666/e0733d.pdfIn PDF document text
    • http://betogav.22web.org/vedotovigol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411250/normal_5feb243d8256d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384839/normal_6042fea91c9c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_602e600639ee9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_c6362876b62747e6892a24b9da9c0c48.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/potamotaz/what_did_the_gospel_of_wealth_do.pdfIn PDF document text
    • http://vugozagiduzek.rf.gd/dynamic_learning_program_activity_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/93987947011.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/five_characteristics_of_an_effective_business_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/amazing_photos_hd_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/zudotisefovoz.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/zipupipat.pdfIn PDF document text
    • http://tokejavopif.rf.gd/sajufimozifuzuvimodonekik.pdfIn PDF document text
    • https://5121d360-3808-4f61-aa44-d87cf2d9d428.filesusr.com/ugd/032e8a_ae4d7741128a4b45b2539a926fcd3df7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/megelugik/dedokobubeme.pdfIn PDF document text
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_e7fb1f3425f141d8a003ade2a9d850a4.pdf?index=trueIn 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_off0001f122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F122 5476 bytes
SHA-256: cf068d31a4158483452140e77e2e846110041488169a261eaa53400efd4d0b75
font_01_sfnt_off000203cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x203CD 12480 bytes
SHA-256: 92a97327027d571b6be6efdf1e136a438c8f5502f545ab12e9d8a589d33ec7d5
font_02_sfnt_off00022e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22E30 16128 bytes
SHA-256: 63e8a462dcd81aaa1440f30310037ad3f5d4c8bb93a8a354e57042f5ecde2e4c

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