Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4cf170b6150177e…

MALICIOUS

PDF

85.1 KB Created: 2021-03-19 11:30:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f2e219b0a903309fa61e68715a7ff895 SHA-1: 0ed9e22216076033939a39383481724edce1c91a SHA-256: f4cf170b6150177e95e53efcf9419ceeef43ebd4f01e85374f09294569f7fcd3
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=pathfinder+enlarge+person+monstrous+humanoid PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412895/normal_6028179ee7430.pdfIn PDF document text
    • https://cdn.sqhk.co/noxibogalu/1iidjju/mechanical_keyboard_switches_tester.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384469/normal_5fe310667e6f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380211/normal_6043960db9598.pdfIn PDF document text
    • https://cdn.sqhk.co/nugilatunu/cjfv7hj/missile_command_recharged.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476767/normal_5fc812875f20d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501364/normal_600abcc418451.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386851/normal_60335e6d00e6b.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/PibLjcP/clothes_worksheets_clipart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368496/normal_60158db07ac2f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ninasivol/vinovuwasekenave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84be28f1-d024-4697-89b4-e1b19965dd24/63502019756.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/witizazikag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87735908-88cc-4c51-8713-ae6ca904816e/what_does_priority_date_mean_on_i_797c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe5bd8db-a143-4a39-855a-6df85f03e300/rowenta_handheld_steamer_not_working.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_9620738f590743b6b1ff54a790d7d366.pdf?index=trueIn PDF document text
    • https://010f2e21-25ca-4560-806d-08cbbb7c7db1.filesusr.com/ugd/74a852_2396947199894226a256f1e0e9ecf5e3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/comparative_balance_sheet_of_apple_company.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/case_study_sample_format.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_off0000f72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72F 5456 bytes
SHA-256: 6aa2afcfbd47e80f51f05143263c3d37a01895c98cf6784080f436b14fdddd45
font_01_sfnt_off0001099b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099B 11304 bytes
SHA-256: 7d601c753046f78273da0e28ff42f7f5247a60206b1c8069b5807f441198bbfb
font_02_sfnt_off00013033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13033 16148 bytes
SHA-256: 3fe40d35e17ab1ce57c3898b8081a6c8e4bc1f65f9c98f6f54b9b6762c7d16b9

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