Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd4898ea52357fdc…

MALICIOUS

PDF

71.5 KB Created: 2021-03-19 17:22:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bc16dc342ad47cb98f51aaf8bc2fefee SHA-1: 138e226aae62b01d3afdacb11c4d75521ba9a459 SHA-256: cd4898ea52357fdc4095817b641cd40e8311d3690ad3ba472b3c42a5038e23c2
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 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/award?keyword=boston+augustana+piano+pdf PDF link annotation
    • http://mybestchan.online/plantronics_co54_battery_lifeztrk2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459937/normal_6023ce472174e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474978/normal_6015c56a95e0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424029/normal_604e3dab29999.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463543/normal_603665668643b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446915/normal_603bbf74b14dd.pdfIn PDF document text
    • http://esmoney.site/jersey_shore_florence_twinsuwz4i.pdfIn PDF document text
    • http://omerkatanalp.com/69612635186kh23v.pdfIn PDF document text
    • http://prizinsta.info/the_fault_in_our_stars_book_age_ratinge37tx.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/zodererezuzuxi/bau_cua_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f3f3de8-8a8d-49fb-af64-3630ac0a33a4/32531351390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e78ae3b9-b35e-4cc3-a37b-8960cd67912c/am_i_eligible_for_government_maternity_pay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deb4c312-ff6a-4455-925a-929a7719d23b/81222479952.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fd966fa-8b7c-467f-b912-3a7de3520b07/motanemetalajonajov.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/stop_kiss_monologue.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/21437517176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/278f6605-2ffa-4b26-a550-a949aa84317b/xepepukutidasojejot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5733aa7-23dc-4d91-aaf7-558e00b22882/how_to_edit_passport_photo_using_photoshop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/089615d1-ea31-45fc-901c-bc220f09113e/36427059689.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/8326918062.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56631e23-ab9e-40c0-863a-5e1dc0ef1c3c/57816312564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/782c4f96-87ea-4b36-b557-2f6c9d33aca3/how_to_use_a_rug_doctor_professional.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14355704-956f-4369-a85f-dc7c04c40cab/how_to_get_attention_from_your_crush_on_social_media.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_off0000da81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA81 5132 bytes
SHA-256: c5aca59abb21515da2071e32ec245e34c3db782da45e2f0af3e2c1afb0241cad
font_01_sfnt_off0000ec19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC19 10704 bytes
SHA-256: 617f4c0af9f17e8c84d756bbe922402ad26d4a4114c430527c819124b6da512a

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