Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc81a0e8c6d2d2b3…

MALICIOUS

PDF

90.7 KB Created: 2021-04-06 16:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5e5b8af07ee6c0e759fa3b406b79aef9 SHA-1: 12699033108f411681e62bd919cc1f51a63c5f81 SHA-256: bc81a0e8c6d2d2b393804e52f7834951b2b7e79a0407e34a9fc7ecdf90197975
104 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 presents a deceptive download button. 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=of+plymouth+plantation+study+questions+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414515/normal_602f9fea56a3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379498/normal_601b1678b3130.pdfIn PDF document text
    • http://doxugivo.22web.org/12679237900.pdfIn PDF document text
    • http://interbankdigital.com/world_at_war_zombies_maps_black_ops34bb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408601/normal_606405250cfb3.pdfIn PDF document text
    • http://fudidudigas.iblogger.org/73122854700.pdfIn PDF document text
    • http://xepekil.iblogger.org/boston_scientific_latitude_6290_manual.pdfIn PDF document text
    • http://topcreditmonitoring.info/pojozowisac9a1u.pdfIn PDF document text
    • http://jubemexor.22web.org/peter_atkins_book.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a4edf7fa-b057-49b5-8014-e5fd436fbef3.filesusr.com/ugd/c8b2c5_d874e8069f56406cbf06583a7e3144a8.pdf?index=trueIn PDF document text
    • https://781b76d0-895c-4d4e-90f3-491762fad171.filesusr.com/ugd/894952_74e05d1e755243a4a0fbab0d616be52b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jeponowon/32501481099.pdfIn PDF document text
    • http://daximukofosape.epizy.com/96241110516.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/2_inch_thick_plexiglass_sheets.pdfIn PDF document text
    • http://lugopupi.rf.gd/beccaria_on_crimes_and_punishments_citation.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/39695326844.pdfIn PDF document text
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_eb0a166909894f4ba489fa3fdc929c31.pdf?index=trueIn PDF document text
    • https://fc9a8e44-b853-4378-b933-957c6fa9ceda.filesusr.com/ugd/1da781_595f08815493432fb6c72acfbb5f89ba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/ganapati_atharvashirsha_free.pdfIn PDF document text
    • http://dijimati.rf.gd/84707189902.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/how_to_reboot_cisco_router_from_cli.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_off00010b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7B 5628 bytes
SHA-256: 7cb5bb230b646805a0a505a0799dedd03f59bb782ff97cfcfd922263b3ece24b
font_01_sfnt_off00011e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E83 12004 bytes
SHA-256: badd06f40508453331846205ff0e326eae51edaee1e356a36ea199e7c03fe390
font_02_sfnt_off000147a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147A6 16144 bytes
SHA-256: 764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf

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