Malicious PDF — malware analysis report

Static analysis result for SHA-256 676de511057364dd…

MALICIOUS

PDF

82.8 KB Created: 2021-03-22 06:40:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83fa89d50eb7e3dccc9a6265520a8673 SHA-1: 73fbeef081bb3eba2bc6d25b52361d7d13594e3c SHA-256: 676de511057364dd351e51fc2770b8483f8d41c4236375658d8806e4efa7f2e2
96 Risk Score

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 phishing or trojan payload. It contains an embedded URL that likely leads to a malicious site, disguised as a worksheet. No scripts were extracted, but the PDF structure and embedded URL suggest an attempt to trick the user into visiting a malicious domain for further compromise.

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://jumiwimov.ru/wix?keyword=la+familia+worksheet+crossword
    • https://cdn-cms.f-static.net/uploads/4369505/normal_6051a4c995f19.pdf
    • https://cdn-cms.f-static.net/uploads/4421944/normal_5fd2f8d68f97b.pdf
    • https://cdn-cms.f-static.net/uploads/4454051/normal_6057f1e7c1920.pdf
    • https://cdn-cms.f-static.net/uploads/4384825/normal_60146fc3e4512.pdf
    • https://cdn.sqhk.co/pifonode/hjW5Hpa/mupofaki.pdf
    • https://cdn-cms.f-static.net/uploads/4457838/normal_6055516662758.pdf
    • http://pofaduxiruk.getenjoyment.net/samsung_un55ju6700f_wall_mount.pdf
    • https://cdn.sqhk.co/pumibavi/1ifP0IE/bezikefofaxigakubodetas.pdf
    • https://cdn-cms.f-static.net/uploads/4418570/normal_60232feb00487.pdf
    • http://vimobewawulipiz.mypressonline.com/4994055165.pdf
    • https://cdn-cms.f-static.net/uploads/4420617/normal_605531ec24d40.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://173455e8-8eb7-44b8-9047-a80245c54048.filesusr.com/ugd/e54fc7_61743b76b3ee448eb2dddf49571afd6d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/76ff2c65-ba63-4b96-a8a1-db8d7566d288/88339614749.pdf
    • https://uploads.strikinglycdn.com/files/a2e352c3-a220-4a87-a6c8-e91fd66574a9/68018418511.pdf
    • https://uploads.strikinglycdn.com/files/ba33522e-f5fa-4898-b372-4b3ec9aaccab/minn_kota_freshwater_trolling_motor_in_saltwater.pdf
    • https://3c3b6f52-20a2-448a-be11-eec5930c502f.filesusr.com/ugd/0ca786_051e4c61ca434205bc3fcc8e565aaf40.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea03.bin
47c04850c8ef139a91de36e5f8bed542c7337aae144fc4d8cbd7ccfee07f0ad4
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA03 5356 bytes
font_01_sfnt_off0000fc28.bin
9289cf6dd8bb01d88458647ca70ea5bcbd02f0dc5d8589b74c1d8bc3f28db113
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC28 12420 bytes
font_02_sfnt_off000124ea.bin
881126320ea04c2eaea05ef6e4b500007eef3914f25984c447bd6a71dca434e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x124EA 17660 bytes