Malicious PDF — malware analysis report

Static analysis result for SHA-256 db6cd4cba63dbe83…

MALICIOUS

PDF

81.3 KB Created: 2021-03-14 05:18:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1a8dc076c7695fe8f1d49a8e0047dbc SHA-1: 2dd802269d86bffc9dd5484cd4251abdf364abd7 SHA-256: db6cd4cba63dbe83f81791c6a283d3b61d06b942b7b056a75c70d9f040751fc6
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to trick the user into downloading further malware or visiting a phishing site. No scripts were extracted, but the PDF structure and embedded URI strongly suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/wix?keyword=uppers+downers+all+arounders+pdf+free
    • https://cdn-cms.f-static.net/uploads/4464852/normal_600b5a1eb7a98.pdf
    • https://cdn-cms.f-static.net/uploads/4449406/normal_600c71ccca554.pdf
    • https://cdn-cms.f-static.net/uploads/4504870/normal_60150e8551998.pdf
    • https://static.s123-cdn-static.com/uploads/4415073/normal_5fe2c4152348e.pdf
    • https://static.s123-cdn-static.com/uploads/4426071/normal_5feb5c711e0c5.pdf
    • http://kekebol.iblogger.org/gujarati_bhajan_aarti_free.pdf
    • http://lynciguest.com/how_do_i_unlock_my_samsung_a10e_if_i_forgot_my_passwordoger9.pdf
    • http://electorat.org/how_to_find_freelance_work_uk6ychm.pdf
    • http://vvinorama.fun/62945088876pyslt.pdf
    • http://gtmedis.com/brother_cs5055prw_project_runway_limited_edition_sewing_machine4umub.pdf
    • https://cdn-cms.f-static.net/uploads/4490961/normal_60201b6624a6e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pesokijodaroxo.epizy.com/kofuvejemet.pdf
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_e9d94f08c97e4713ba9c37acdfe59998.pdf?index=true
    • https://d6504552-49b0-4b7d-b1ff-94f9e1082b83.filesusr.com/ugd/1f0558_110349c5ca8348e4a1885efddf906bf4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/da2753ed-40e1-40dd-8d22-a33c2800cca0/bowonamas.pdf
    • https://uploads.strikinglycdn.com/files/ecd78a75-87f0-4748-a941-534dcd9d184a/how_to_install_hampton_bay_fan_remote.pdf
    • https://dcd55a6f-f4d9-4ab7-9ea0-0dac4ffa5d6f.filesusr.com/ugd/f7cbe4_aa07f8ea8858455a97278cfc464a348f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/eb46fd32-cdb8-42eb-84c6-78cb4d64ed9b/zexitepotibuzogidiguzal.pdf
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_7f4378dc5d1c4414b049d50391b9fb2f.pdf?index=true
    • https://1c437d0a-cccb-4a8a-93f1-39e0b5126915.filesusr.com/ugd/b91566_f33bf5e1efa048b1b5d29e0950b7a4a4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d303c67e-24d7-463b-bc77-13414bec8d9a/12375331706.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
    • 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_off0000e9a0.bin
826c841312c4da162c43cc0e1196b091b48f94199501817d8e58ac2e05d24777		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A0 5120 bytes
font_01_sfnt_off0000fb2f.bin
96dd289f838d1e17a1596cc21448ebe2462e01f23896807f0071f7a1edfefed5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2F 11432 bytes
font_02_sfnt_off00012260.bin
29b8095464fa9501f2379a4c43ca3ba1b1df604f87f2abcbe11fa9bdafb8ec10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12260 16084 bytes

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