Malicious PDF — malware analysis report

Static analysis result for SHA-256 df78e078658d218c…

MALICIOUS

PDF

70.7 KB Created: 2021-03-16 08:00:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: a0d84a9ff658ded33a3b270ae217996b SHA-1: c0ed5279819dc5907788525e6e75ea5a28721870 SHA-256: df78e078658d218c61cfb51e7a27bbab35d7ec3081c534f6cca209a4f7218c85
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by both a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'seumenha.ru', which is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'Bauhaus' to entice users to click the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8858

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://seumenha.ru/award?keyword=bauhaus+weimar+dessau+berlin+chicago+pdf PDF link annotation
    • http://insta-sale.site/narudepunitefusawamawgefzc.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/can_samsung_tab_4_charge_wirelessly.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452594/normal_5fdf8f668fac0.pdfIn PDF document text
    • http://tajuliwelofiti.medianewsonline.com/68645576851.pdfIn PDF document text
    • http://fatiberekizibu.iblogger.org/gcse_physics_acceleration_worksheet.pdfIn PDF document text
    • https://bifomika.weebly.com/uploads/1/3/1/8/131856700/zogajaminaf.pdfIn PDF document text
    • https://feronokemafa.weebly.com/uploads/1/3/1/1/131164109/9620655.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_60322e33232f4.pdfIn PDF document text
    • http://fitit.space/15719599271fd9wg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460980/normal_603b1ed44eb5d.pdfIn PDF document text
    • https://mofutobanu.weebly.com/uploads/1/3/1/3/131383854/mikigabuxoxep.pdfIn PDF document text
    • http://bilkaita.space/psr_e463_owners_manualp8fbz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365621/normal_5fff81489b0fe.pdfIn PDF document text
    • https://jigudubexafodi.weebly.com/uploads/1/3/0/7/130738940/gatox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426972/normal_6010b6e300e1e.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/wozoxub/how_to_start_consumer_electronics_business.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/calories_dunkin_donuts_bagel_with_cream_cheese.pdfIn PDF document text
    • http://niwerujegip.epizy.com/how_much_do_field_irrigation_systems_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/aadhar_card_bina_mobile_number_ke.pdfIn PDF document text
    • http://pudibok.epizy.com/how_to_pack_up_4moms_pack_and_play.pdfIn PDF document text
    • http://jarepumemaxi.onlinewebshop.net/air_force_academy_colorado.pdfIn PDF document text
    • http://nufularo.epizy.com/fojuranekogosogifomofuk.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/esl_worksheets_for_reading_comprehension.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/what_is_the_setting_of_place_in_the_poem_an_old_woman.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAA 5848 bytes
SHA-256: 97e0a317a0c10be128db2110108a9ee6f661396fe744c7b35b247526740e0dd7
font_01_sfnt_off0000f27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27C 10688 bytes
SHA-256: 7d4c0d4b2eb6173a8aaf72cb684482a9008bc6344b4a9e4f8a8e980152e0e7b7

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