Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6030015e7e44fe2…

MALICIOUS

PDF

87.2 KB Created: 2021-03-06 02:04:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e55a017d2bbb81ff7debec737d10cc2b SHA-1: 2e02d9f820064615ecda7a3cc96c01e59e588a43 SHA-256: f6030015e7e44fe222e841f073b51c6890140c60deabda94d9ee0aa28aad6736
156 Risk Score

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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/123?utm_term=confessions+of+a+mask+yukio+mishima+pdf PDF link annotation
    • http://jobopenufa.iblogger.org/leveling_guide_wow_classic_wowhead.pdfIn PDF document text
    • http://zimagobotas.22web.org/creative_sound_blaster_x-fi_software_windows_10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_15f7d1f387cd4ec3bc9ae6ee4e21a1b1.pdf?index=trueIn PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_f1d1d627428d42d09741114d4378dea1.pdf?index=trueIn PDF document text
    • https://c370dac7-4848-4fa0-a6df-94361299e8ba.filesusr.com/ugd/fa6303_ab829b42db214388a86e266f56cfdb59.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gapivegek/polamubi.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/android_ndk_archive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d3efce9-9e9c-499a-9a49-c18c848e1fc5/romojepowuxewutikaverib.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/77636519383.pdfIn PDF document text
    • https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_678f926fd1024ad1b2af92a08659e42c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/jizevufifewusowiv.pdfIn PDF document text
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_563beb6aff874f858be839d7c1a85313.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/char_broil_performance_vs_advantage.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/carrier_30xw_water_cooled_chiller_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fb45138-6451-4daf-85ad-4dc13066b0e8/alpha_lit_twin_cities.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f61d1d8-9b6d-4657-9e0a-c15d9141f4d4/how_to_control_a_dc_motor_to_run_in_both_directions.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/65028292382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48580779-6852-4bd0-833e-1d70ee02dadf/delirarune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f17e48e-5886-474c-842d-ec835d10d470/mufatijoxodusewanivu.pdfIn PDF document text
    • https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_0b7f518c7f0a452c8b5ebca933a15d92.pdf?index=trueIn PDF document text
    • https://de7eff9d-5c50-4122-bb99-ee112abf7a8f.filesusr.com/ugd/db8f21_6ab77dbb94f74d3fbc2bc38d1137316f.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7F 12920 bytes
SHA-256: 02a257d77812e39bda058bfe6537b7978acfec95806866225bea53de6472cf69
font_01_sfnt_off0001178a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178A 5224 bytes
SHA-256: bbabc8f3883bacbd85e83854ea219e668e9a08acbaa2e23cd7659ccfeda67586
font_02_sfnt_off0001293f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1293F 11568 bytes
SHA-256: 0bff3b5b91239c183c5cce2a6994cc5da785cd2ccfa950fc6e51b15fc7850897