Malicious PDF — malware analysis report

Static analysis result for SHA-256 1708761950c80069…

MALICIOUS

PDF

66.7 KB Created: 2020-11-10 01:09:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b5d262a56eb2fb0f34a9a8231eebfff2 SHA-1: 9cbb24771992c3385e4b0206e6451ad753133e59 SHA-256: 1708761950c80069fdff9477e0de12cb0137ec8562f4cfd2e2e09341245429a4
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://gettraff.ru/123?keyword=chitina+dipnetting+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4485818/normal_5fa9c6f784f4a.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/4816e706-fc93-4671-a17a-d230e66bd909/nys_pta_where_we_stand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a6d6fe7-5c85-44a0-97a5-3d3756ceef46/the_witcher_3_complete_guide_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6db75c0-2752-488a-9579-804af263914d/78917127421.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3b29156-a78d-4ea2-836b-1b0a5e39a3f9/tmc2100_stepper_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ec50395-1294-4975-8e10-0f9fb15ce21a/assassins_creed_origins_skill_tree.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51823375-ccac-4218-af24-3fba771fbdf7/zimavojadabagisuvuvikalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c857a35-5e3a-48c8-8506-dfb5a375b6b2/13639325011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a8879f0-42bd-43d1-9659-58a27f04d6f5/bmscs_dpscs_neurogenesis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cebc5e92-be3f-4425-bc72-a9c8be717183/munagawufofigigusosijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50c4dec4-026c-449a-af27-1895648ef409/jamewan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5eb7a09-a82e-4ec6-a03b-2ed37f72083f/pepib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7962f281-1c19-415d-8e7a-e570cc6cd259/rochester_white_pages_phone_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f12458a5-5d2d-4bfd-9e51-d3375af3a5f8/remupokaxim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffe47b83-a953-4551-802a-035d966d0b96/degirawixonobujinokisute.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_off0000c8be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BE 5096 bytes
SHA-256: 8d0fe051c3b7053d81196e6eed70fd2030fdaa52a5cbe7c9cf690e9dd1b71564
font_01_sfnt_off0000da10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA10 10576 bytes
SHA-256: 44f7f44c6b96ffd52da42103cb3d66096677729329d44da133fc20007573be60

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