Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fe9b92d9a3d860b…

MALICIOUS

PDF

87.9 KB Created: 2020-12-06 06:45:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 900b2792abe2be8b5150f4e8318089c7 SHA-1: 3f7c8d982211d403f660f81abb23557347e3f699 SHA-256: 2fe9b92d9a3d860b88e2a19ef545635170d3b6d13d6f43298e70a32b973e5bfd
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 0.9998

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
  • 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://traffset.ru/123?utm_term=middle+school+calculating+density+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410216/normal_5fcbda9f36a48.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/67841c72-95b5-486b-83ce-cd03ba148840/transmission_of_human_traits_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/74457841851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71ba4075-7c56-4113-abc5-af222f9ea475/5th_anniversary_gift_for_her.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/655586ed-4010-43fc-a984-0c1f4f841200/biological_science_freeman_6th_edition_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52703159-2393-412e-8a4b-93f993d27fad/hack_asphalt_8_for_windows_10.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc00874a5bc066edfa0f7a0/t/5fc10630f3de5e49b588a8c9/1606485553281/fikogoponugaxawele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3daf2d65-99ed-4a96-ac6f-7c0b142b3c10/latimefiwuganox.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/berchmans_songs_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0764ee3a-2c17-492e-875c-476348b73ecc/kerixenuvejezituto.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e70d1452f90b7fe56088/t/5fc7733e93ad1a48121ce907/1606906689159/nagamanafozenixugu.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/classification_prediction_data_mining.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06a58dce-3b8e-4662-bfaf-88474c9eb872/levirapivoginavujaso.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_off00011db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB1 5464 bytes
SHA-256: 7c37a410634878e797fb754087f40592dd38747452f8a381a98f3ab10b8de9bc
font_01_sfnt_off00013065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13065 9936 bytes
SHA-256: 2dd68c06c30de77cb7a37b68e1c93c7688e976c4ed67ba06acd04f177d13d200

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