Malicious PDF — malware analysis report

Static analysis result for SHA-256 db0b03347c9f65eb…

MALICIOUS

PDF

73.6 KB Created: 2021-05-31 06:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6a5976df33818932105c02041537e7eb SHA-1: 10472e11827d25807c382a8441b9ee88b3ae222a SHA-256: db0b03347c9f65ebfd33395495830af37de9a12beebac48f0c642ae4de20f6fd
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'golowaki.ru' suggests an attempt to redirect the user to a potentially harmful site. Although no scripts were explicitly extracted, the PDF structure and the nature of the detection (Phishing.Trojan) imply that the document likely exploits PDF vulnerabilities or uses embedded JavaScript to achieve its malicious goals, such as downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/123?utm_term=amma+song+tamil+whatsapp+status+video PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477910/normal_6009c73d1f25c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392191/normal_5fce8b699b405.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369146/normal_5ff69387a35a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415292/normal_604d8c6fe36ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449392/normal_60436d058282b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467577/normal_60651d0f39aa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368494/normal_600a7ce82adbb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379220/normal_5ffd2a89472f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_6058e83c85c53.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/881ac21e-0fd1-433f-8f8a-cdee66320abd/insinkerator_evolution_select_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84a407e2-025d-4296-b396-935ea4a9f475/woolworths_job_application_forms_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf5ff611-36f5-40a1-89b9-8c4f2d06a5ed/15456050328.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a512928-4564-4cc0-996d-481c70ec74dd/tamil_hd_movies_download_website.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a3e1728-670f-4cf6-bdd1-fb272037854f/25809048361.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da87f939-dfb3-4954-827d-9f4c869b9fbd/64933119090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8291beec-798e-4e1c-a7dc-c43bf2d86e28/42389566784.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdae1a89-8630-4943-95d5-c1fdbd49b756/regej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/978e07fb-2d09-4015-aa51-87704bf4c37b/2878546333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fe873ac-fa86-4bce-b560-131835a596f7/63605177282.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC98B 5420 bytes
SHA-256: 338b5808938de9da1dd5baf34a96a20aeb14eb94a8b753cdbceff2c7989a1ab0
font_01_sfnt_off0000dbe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE3 3800 bytes
SHA-256: 6fe7029f68d649ecf4016de0f7c54085978c6dae178c6a274f567052f4c124aa
font_02_sfnt_off0000e9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FF 2268 bytes
SHA-256: 06cda1e29f08b0a0c7df222fc92b3eedac8c4c2594860f95649bcaa6ecc24f41
font_03_sfnt_off0000f47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47E 9840 bytes
SHA-256: dbdad0b5ac083723a39c688163991faa8918e2589d3cde7ba51e99cef7784c72

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