Malicious PDF — malware analysis report

Static analysis result for SHA-256 80bcf9114e56718c…

MALICIOUS

PDF

78.2 KB Created: 2020-11-25 05:26:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0b152bce6be9705fb5df953b44d55ba7 SHA-1: 65daa04eee61280df66d4c2f3c23fc4805b93efb SHA-256: 80bcf9114e56718c3f4452b22f3ab0030b39ce7b0d556c8c5ecf5563d6493f60
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text related to downloading music, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://trafffi.ru/strik?utm_term=descargar+musica+de+montez+de+durango+gratis PDF link annotation
    • https://rurizurerenudiw.weebly.com/uploads/1/3/4/6/134649160/winuju-goludalenura-jikuvigesawi-fogod.pdfIn PDF document text
    • https://xulavuxedipi.weebly.com/uploads/1/3/4/0/134017657/kewixagopeguvi.pdfIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/tudawufed/the_book_of_amun_ra.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/angry_birds_1_game_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f59d465-52f6-49aa-97b6-35c38e26031a/dimanazutosedubimon.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/sata_3._2_spec.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/bach_invention_6_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/uptet_written_exam_syllabus_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8063e712-1c70-408d-899f-51bd4d159abe/43725656811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/364ad9b3-084a-49f0-bb9c-2acc5d8d72d8/lexus_is_200t.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/pwsh_mypisd_net.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/dedo_pulgar_foto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eade6460-c7d9-4938-aeb2-fe97ec61f123/simajexuwaporelugopexexud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f84a2e12-71d5-4ad4-8f61-e30ff6030fc7/how_long_does_implanon_last_after_removal.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
    • https://s3.amazonaws.com/silubebebefuju/In macro / runtime command snippet
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d10d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD10D 5276 bytes
SHA-256: 56cf8d2f39477feaee04b8cc8421e1bb57836bef5572bd5cef999e85817a64e8
font_01_sfnt_off0000e2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F0 2316 bytes
SHA-256: 1f4ab3dc7109b145c55e010206da44dc5b766b523135897298ed1d8498437569
font_02_sfnt_off0000ecdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDF 11848 bytes
SHA-256: 37764c3e6113d62d9d80254dd3f402d010527eb4f71c7757483e2603c32e2a96
font_03_sfnt_off00011392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11392 16188 bytes
SHA-256: 2ba12f7a18d437522231acf01626f6eefc59107f6439098af385542702a52ce5

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