Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc3a9c90e0e83c27…

MALICIOUS

PDF

60.0 KB Created: 2020-12-01 21:01:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 44f2dd24df81947e1410efa3ff94ff5b SHA-1: bb5e9076fc753d5933a8f9ee524cadab6f2ffa09 SHA-256: cc3a9c90e0e83c271ab5d04e8f99449c713e77b960da1cecbb57e2c6cfcfe29f
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://traffnew.ru/123?utm_term=duluth+east+high+school+calendar PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416299/normal_5f9582a0370ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4fd83485235c86bcf03c/1606373337008/kuzeruzim.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28d360b6b03258f4005db/t/5fc3f0ee18e72e5fdb51c0d9/1606676720510/in_the_beginning_walt_brown.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bc707a2-04ff-4fdc-b40a-560f3b79d7a6/91918586120.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8827eb8-7f3f-470f-be05-0df0bf4b8eef/tadejomojowizuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e23fa87-81a4-416a-9666-101e3f7c8697/73837225535.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf5a51491241adc44f5f6/1606219174002/16894248780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/865f0810-e64a-4997-8edb-ec25b0a33229/divisiones_por_una_cifra_para_imprim.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd56316f6d44b07b8b81c/t/5fc352032dd96f59185862c6/1606636035748/the_design_of_everyday_things_epub_vk.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/71090582951.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/35753745093.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/detailed_lesson_plan_in_english_grammar.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/o_charley_s_nutritional_information.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_off0000b016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB016 5200 bytes
SHA-256: 83f754306e1839274948e40aa912b825ccad1f26be6a4490a8bfe23b70597556
font_01_sfnt_off0000c1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1C1 9740 bytes
SHA-256: fc0c34a7ff73083e5daf23cd88018e218ccbccf728b9d1581ad298136983623e

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