Malicious PDF — malware analysis report

Static analysis result for SHA-256 39bbf52b8129bbb9…

MALICIOUS

PDF

81.0 KB Created: 2021-03-30 07:58:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b6fe30074072d32325cce0c0df34a730 SHA-1: 59637456d43361e44d13fb9ade06d43826997233 SHA-256: 39bbf52b8129bbb9ba996727c8f47db6ffb37281ce6fcdf70eb071ae3a2cc9db
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://druttle.ru/award?keyword=classification+of+library+materials+pdf PDF link annotation
    • http://bosamitax.22web.org/45060378999.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530910/normal_604f428d1cda0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480387/normal_6054eb548f425.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374698/normal_6047fa25daea3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365627/normal_6006a2091db82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379043/normal_5fe0530e6e9dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367912/normal_60017ab89f3f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457577/normal_5fccfc6598655.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527859/normal_601fb8f2dd555.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424637/normal_6020779c8adba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484632/normal_5ff2c32fcae77.pdfIn PDF document text
    • http://fenofojerafama.22web.org/citalopram_davis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9ac3c61-e0c2-47c1-ba8d-56ad015f07b5/savomajagitikefe.pdfIn PDF document text
    • http://jofawapedoguw.rf.gd/kimibetil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7685b837-5752-422f-a633-be28bfbb0413/how_to_turn_on_sony_car_radio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1394fa39-8790-4b62-95ac-378f15e151f4/jusaxiwizaxukete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5938e434-f2e1-40d1-a3ac-1cb5b99f794a/wupagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7250afa9-abe0-41c2-9a67-c9798c7ea969/delta_unisaw_motor_brushes.pdfIn PDF document text
    • http://nakobebujem.epizy.com/pirifijuxavezekanumifif.pdfIn PDF document text
    • http://xazejove.epizy.com/24031460254.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2C 5448 bytes
SHA-256: 4b3457879b2b67055dc95aefa92f6ac5c81614a6a141a59135aa225e3ce00eb7
font_01_sfnt_off0001119a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1119A 11248 bytes
SHA-256: f2b0733278cd0dd37f88eed8c178f124e1bbe36b11023ee5169ec761ec281b45

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