Malicious PDF — malware analysis report

Static analysis result for SHA-256 94b957e1e2e323c3…

MALICIOUS

PDF

92.9 KB Created: 2021-06-05 17:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d1c8ced4b5787931d2191b4debb6ce81 SHA-1: 50196eee369fe0be7e1e9710070851cddd49b5e1 SHA-256: 94b957e1e2e323c313fca1e5607685eb8922780fd9b7f2a15735b6e5595abc1f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL. The ML classifier and ClamAV detection strongly indicate maliciousness, specifically phishing. The embedded URL likely leads to a malicious site designed to exploit the user. No scripts were extracted, but the presence of an external URI is a strong indicator of a phishing attempt.

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
  • 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://drafthe.ru/pbw?utm_term=eba+9+s%25C4%25B1n%25C4%25B1f+matematik+denklem+ve+e%25C5%259Fitsizlikler+ile+ilgili+uygulamalar+1+cevaplar%25C4%25B1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366627/normal_6011ea817ea4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372358/normal_5fedfeb121d87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500679/normal_5ff54ee1e63d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486566/normal_602d481164652.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4531523/normal_605d5ddfa50fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455673/normal_60bb5063a8746.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383922/normal_6051ce956d0cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473619/normal_602a109e083c6.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/3fc7a48c-5c39-4aad-a445-1acbfd76b886/double_down_saloon_yelp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/955ff11d-a0e1-426c-b281-f7c6cda83d4a/the_carrie_diaries_season_1_episode_8_watch_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42f5fb3c-d7ab-4d9b-a160-72bf05046160/nfs_rivals_apk_download_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24c2cbe8-207e-4566-889f-8c1767dff432/is_1650_psi_good_for_a_pressure_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daf6a521-a934-48c9-b71f-f2f233c0899c/kenmore_gas_stove_parts_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/381d90c6-0be2-4417-8a4d-33fce46b3afc/how_to_use_remote_samsung_smart_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feeae39d-a998-45d9-bfe9-d3ce6cd5c4cc/71595114477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73db4907-a5d7-4b95-a897-1c37f338baa0/pride_and_prejudice_1995_cast_mr_darcy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3f74c20-f3c6-4ff9-b8b9-29fc82739fa5/natesanaxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e18e22c9-6ea5-40ea-a106-711b67c5ab9c/jepuwazajovagememikogexo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a5f633-9e9a-403a-880f-3f497d188994/what_schools_offer_vet_tech.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_off000123b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B5 6336 bytes
SHA-256: bee8edb7a3b66da4a8f7d570eed6a8d11284e2faa71aa822d8af6c9e6b79b7d1
font_01_sfnt_off000138d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138D9 13392 bytes
SHA-256: 6a0643bc37802685d00e0ff324e7ad859b64d23037c41959572482339fb32110

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