Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a7f67be1f4027b…

MALICIOUS

PDF

78.2 KB Created: 2021-03-22 23:13:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7dfa43551c69f0c7b876b67fd8cae5ba SHA-1: 7c6e191b664e64cde48b7cf0a0441b52d3bdcd17 SHA-256: 64a7f67be1f4027b615bb24b286dae90e7d7d7baf600258c5158108cadc60bf2
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that likely leads to a malicious site. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a harmful external resource, likely for credential harvesting or malware delivery.

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://jumiwimov.ru/123?utm_term=pathophysiology+of+puerperal+sepsis+pdf
    • https://cdn.sqhk.co/taxodisilif/9UYLtid/best_free_qr_scanner_app_for_android_2019.pdf
    • https://cdn.sqhk.co/vekuperik/7haFLKI/wwe_rumors_and_spoilers_cageside.pdf
    • https://cdn.sqhk.co/vatukaso/bJ5gf4g/die_in_100_ways_apk_indir.pdf
    • https://cdn.sqhk.co/boxepupovemu/dhdDhfv/weginakadiwa.pdf
    • http://zujewubowufonug.scienceontheweb.net/makeratu.pdf
    • http://niburufajanuto.sportsontheweb.net/what_is_the_purpose_of_a_safety_file.pdf
    • https://cdn.sqhk.co/rodisukipi/fvzGGjd/50930949172.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/25ddc092-b0c0-4278-b5ff-5104e96cc083/31945952633.pdf
    • http://nitubak.atwebpages.com/45175335924.pdf
    • http://sajoveguduv.onlinewebshop.net/past_simple_test_elementary.pdf
    • https://uploads.strikinglycdn.com/files/344ea8aa-39f7-483b-b5f7-30072e6824d6/warogasavojuw.pdf
    • https://uploads.strikinglycdn.com/files/f5b2bf54-7d7f-43e1-b2d6-bceb0d296971/66201524544.pdf
    • https://uploads.strikinglycdn.com/files/838bc301-47af-46a0-b0ef-f9794b25cfa1/94404325858.pdf
    • http://poborunedajemo.onlinewebshop.net/call_down_the_hawk_maggie_stiefvater.pdf
    • https://uploads.strikinglycdn.com/files/490179cc-f0ca-4460-9e82-03b484c6e666/nekupojavafimogodemep.pdf
    • https://s3.amazonaws.com/pusori/40815530683.pdf
    • https://s3.amazonaws.com/xukonakefules/grenade_alan_gratz_free.pdf
    • https://s3.amazonaws.com/bibejovixapis/kazexonisomonisali.pdf
    • http://sazasewugekupej.onlinewebshop.net/how_to_reset_spandana_password.pdf
    • https://s3.amazonaws.com/fedure/influenza_vaccine_patient_information_sheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e658.bin
2072a911f39aa4e35e475310715596072e780ed5ee66749ad920e462c3784e10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE658 5184 bytes
font_01_sfnt_off0000f81a.bin
fba35db2f72d83010c5641b31221d7ab04dd67d9e8c634e18ab03cb3cd4e4477		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF81A 10896 bytes
font_02_sfnt_off00011d55.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D55 4324 bytes

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