Malicious PDF — malware analysis report

Static analysis result for SHA-256 820eec5f7b92c07b…

MALICIOUS

PDF

64.9 KB Created: 2020-11-21 07:18:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3a5c36c0ba3863799a4d589b13757c58 SHA-1: 53c866a6590757467f67d9540cfe25a8501cd7ad SHA-256: 820eec5f7b92c07bae5d4c35053cff4fc96a4def02d2594b6cc88bca80cedb0b
154 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 routes users through malicious redirector infrastructure. 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/aws?utm_term=lightning+returns+100+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404745/normal_5fb5466c2e82a.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/nonabafat/creader_9081_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94411304-60eb-490c-92f3-afa90ccbe1e7/vowamulakiwuwal.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/furutujavelosejivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6f2d2bf-00b5-4e48-bf99-97135791350a/37455909936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffee2f5f-115d-4cb4-9fc5-a289ab82420e/btd_battles_comprehensive_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/light_waves_and_color_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18e32907-9913-4f22-9b60-b1f5d0594753/besipivexiwuza.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/thompson_chain_reference_bible_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9470d198-b344-415d-b362-f95cc3214d7a/wubonuvog.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/adjectival_phrases_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/nissan_2005_frontier_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/3_variable_system_of_equations_worksheet.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_off0000c100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC100 4980 bytes
SHA-256: b0fea579d24d9958c4465f982df2a57be35d9c41f79c901f530d0d07564f6c23
font_01_sfnt_off0000d1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FA 11376 bytes
SHA-256: 5f1e5664ab13773b3904d8468ef76a605d34aedfee6753f34da08cb3b9e880ab

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