Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7df0df1e174da2…

MALICIOUS

PDF

87.2 KB Created: 2021-06-11 04:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fbb74545cccd8b62f2c1b9c48628d27 SHA-1: 6cbdee3b9b40b4233ad071bb0f67d98f971d1124 SHA-256: ed7df0df1e174da28368d0056e2bde8571ecdfa2aaa026382d6aa9cddd66f0f4
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a website with a quiz-related title. This is a common lure for phishing attacks or to host further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, and the PDF_URI heuristic confirms the presence of an external link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://medvor.ru/pbw?utm_term=villain+quiz+questions+and+answers
    • https://static.s123-cdn-static.com/uploads/4458833/normal_5fe5ac221778f.pdf
    • https://static.s123-cdn-static-d.com/uploads/4502493/normal_60b1ca14e35b4.pdf
    • https://cdn-cms.f-static.net/uploads/4485308/normal_605bf9b73fbb8.pdf
    • https://cdn-cms.f-static.net/uploads/4366034/normal_606a1445ac5da.pdf
    • https://static.s123-cdn-static.com/uploads/4450353/normal_5fdcf917c419c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4a5ab234-d131-4913-bb2e-eb0c475fef0c/2005_mercruiser_5.0_mpi_fuel_filter.pdf
    • https://uploads.strikinglycdn.com/files/889661bf-445e-4c65-adc9-12bc0555675c/35077382042.pdf
    • https://uploads.strikinglycdn.com/files/4b7b3c57-07e3-4174-9ff9-1f5bbf12fe47/vunodo.pdf
    • https://uploads.strikinglycdn.com/files/a6afef36-bf28-461c-b5f9-cddffadf3289/windows_10_1909_iso_google_drive.pdf
    • http://fetinaduv.pbworks.com/f/free_life_recovery_bible_by_mail.pdf
    • https://uploads.strikinglycdn.com/files/27adca24-484a-427c-88d5-0dcc48ed14ec/fun_way_to_do_table_topics.pdf
    • https://uploads.strikinglycdn.com/files/86edfdee-539d-4de3-b975-0dc5899a1b67/arduino_uno_programming_tutorial.pdf
    • https://uploads.strikinglycdn.com/files/9c794d50-6360-4f83-84a7-94e9a2828178/harry_potter_book_4_audiobook_free_download.pdf
    • https://uploads.strikinglycdn.com/files/8129c59a-9991-462a-9cbf-f8b3c29b52e2/is_chime_a_reliable_bank.pdf
    • https://uploads.strikinglycdn.com/files/d4e0f2f4-0953-4af0-88ea-d555deca859a/bujodutodulajabet.pdf
    • https://uploads.strikinglycdn.com/files/f4ac8350-f491-43eb-97b6-effda65053ec/kawibutadowexe.pdf
    • http://xuzutoli.pbworks.com/f/bloons_td_5_download_apk.pdf
    • https://uploads.strikinglycdn.com/files/ba999cc8-89c7-41fa-bf2d-6d184ab3471e/dinawisesalipasiludelod.pdf
    • https://uploads.strikinglycdn.com/files/8a8c1381-2e08-402f-927b-7e8c800b97c6/research_methods_in_psychology_book_paul_price.pdf
    • https://uploads.strikinglycdn.com/files/69c50cbd-5aad-4d53-b6ac-223e5ee1dc59/12th_ethics_book_back_answers.pdf
    • http://gafuxexosaru.pbworks.com/w/file/fetch/144681948/free_blank_purchase_agreement_form.pdf
    • https://uploads.strikinglycdn.com/files/c3db9163-9601-48b4-a401-d379811905a3/tegijejobi.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_off000117ca.bin
11655fb975980a25ba5cab083c9a4e1d4f2b1e8f3ce6886b3072032e614f54c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117CA 5052 bytes
font_01_sfnt_off00012921.bin
361262cbd8422c2fa51a42b53f6b3a6e5331d19cc5e916560f315232d8b6fe9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12921 10624 bytes

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