Malicious PDF — malware analysis report

Static analysis result for SHA-256 c65b2fda855f4515…

MALICIOUS

PDF

87.6 KB Created: 2021-05-30 15:12:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4199499c340caf4bfef7c36a04da97e6 SHA-1: 453a3fcbf967d434c86ff3ef79e58cb51a01247d SHA-256: c65b2fda855f4515466fb27a4c936b1d30c2c9d863e523adce7e976af211e000
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a ClamAV detection and an ML classifier. It contains an embedded URL that mimics a search query, likely intended to trick the user into visiting a phishing or malware distribution site. No scripts were extracted, but the presence of an external URI and the overall detection suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/strik?utm_term=is+bovada+illegal+in+texas
    • https://cdn-cms.f-static.net/uploads/4479240/normal_605ad0ea2b498.pdf
    • https://cdn-cms.f-static.net/uploads/4486969/normal_6014158632a07.pdf
    • https://cdn-cms.f-static.net/uploads/4498868/normal_603f2124d9d71.pdf
    • https://static.s123-cdn-static.com/uploads/4454426/normal_5fcf2c3ae2842.pdf
    • https://cdn-cms.f-static.net/uploads/4406473/normal_606b09ed2f782.pdf
    • https://cdn-cms.f-static.net/uploads/4408583/normal_604cba30d81ae.pdf
    • https://cdn-cms.f-static.net/uploads/4481271/normal_6010964345ba0.pdf
    • https://cdn-cms.f-static.net/uploads/4497110/normal_60112c7f9cca0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/db81a797-1a4b-4929-b63e-726c547aa2c3/vuescan_serial_number_and_customer_number_mac.pdf
    • https://uploads.strikinglycdn.com/files/2c64fc72-a534-4a77-962e-5b2a2b149fba/dezitutisemesigi.pdf
    • https://uploads.strikinglycdn.com/files/b48331c9-8295-4bf3-905c-33b7895d94f7/kewixodoseviwedofekejar.pdf
    • https://uploads.strikinglycdn.com/files/743989df-dfab-44df-8a94-16d3f3977871/bibaho_obhijaan_hd_movie.pdf
    • https://uploads.strikinglycdn.com/files/b97d9f80-bb5f-4685-bfea-99f5810e414e/what_is_research_paper_according_to_different_authors.pdf
    • https://uploads.strikinglycdn.com/files/831ddf74-9048-4eff-b047-94eff5e7a2e9/define_internal_control_in_auditing.pdf
    • https://uploads.strikinglycdn.com/files/65b87aa2-87a5-475c-9c71-1c01cf480e8b/canna_terra_feed_chart_uk.pdf
    • https://uploads.strikinglycdn.com/files/ba111078-b13c-476d-a73c-c8c6b4e63130/akretim_niversite_ders_kitaplar_indir.pdf
    • https://uploads.strikinglycdn.com/files/8598749d-df2d-40ad-913b-1ea6ec7df416/rusanodalodiso.pdf
    • https://uploads.strikinglycdn.com/files/27be2b1a-aeea-4489-861f-5f8819787025/genusabibusiriveropolos.pdf
    • https://uploads.strikinglycdn.com/files/9e11df6f-a150-4001-a60a-9205e0815e80/nemovuxodozukevefovit.pdf
    • https://uploads.strikinglycdn.com/files/d5933c26-8c06-45c8-af4c-2b1849cd8e78/sap_tutorial_for_beginners_free_download.pdf
    • https://uploads.strikinglycdn.com/files/c4ea714d-bcf7-4bea-bbbd-42eaf78e2d98/60415980332.pdf
    • https://uploads.strikinglycdn.com/files/40514bab-b358-4fb9-b978-2a156479e859/68747038670.pdf
    • https://uploads.strikinglycdn.com/files/d48e5eb9-4fc7-47d6-978a-287fa3ffbdbd/what_is_the_formula_of_distance_in_motion.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011869.bin
467cb307a47307343199cc379b836c9f9e988b219d42514fdd884a57be477099
pdf-font-stream PDF embedded font (sfnt) at offset 0x11869 5104 bytes
font_01_sfnt_off000129df.bin
8d01a5d9f1be048fb5c2ad92db30b46e7ec5765a53f96bd4c7b7269d72c5b03b
pdf-font-stream PDF embedded font (sfnt) at offset 0x129DF 11948 bytes