Malicious PDF — malware analysis report

Static analysis result for SHA-256 1307e1ccf876a3c4…

MALICIOUS

PDF

99.5 KB Created: 2021-03-21 00:41:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3785bee857355e510f7d7731dfe595ba SHA-1: 21510f0e6b62c5c562e14a9aeec480b0180e5f4c SHA-256: 1307e1ccf876a3c43b7ebb9e02a59b9cb350a8d97aa3a68e2ca803d2e8da9f25
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/award?keyword=impulsive+premeditated+aggression+scale+pdf
    • https://cdn-cms.f-static.net/uploads/4422135/normal_604b2a9b10adc.pdf
    • https://static.s123-cdn-static.com/uploads/4421474/normal_6004a9710e15a.pdf
    • https://cdn-cms.f-static.net/uploads/4485454/normal_5fe9b9c3e93ae.pdf
    • http://nunobuzipame.medianewsonline.com/examkrackers_101_passages_biology.pdf
    • https://cdn.sqhk.co/vidoperife/jewAOib/womens_button_down_shirts_made_in_usa.pdf
    • https://static.s123-cdn-static.com/uploads/4470532/normal_5fc7d2e277079.pdf
    • https://cdn-cms.f-static.net/uploads/4482216/normal_602d45a066951.pdf
    • https://cdn.sqhk.co/xivijela/WfhfgdZ/bezuvilobudasika.pdf
    • http://vitetoka.scienceontheweb.net/21433445870.pdf
    • https://cdn.sqhk.co/petawelesup/gVYXgi6/speed_night_3_apk_mod.pdf
    • https://static.s123-cdn-static.com/uploads/4373999/normal_5ff9a484c3028.pdf
    • https://static.s123-cdn-static.com/uploads/4443617/normal_5fcdf9cf8e079.pdf
    • http://budofibo.mygamesonline.org/temperamentos_transformados_pelo_esprito.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b0bb7a3e-b357-4244-84f9-e0d088d2a8d8/the_difference_between_your_central_and_peripheral_nervous_system.pdf
    • http://mepitar.atwebpages.com/cutting_edge_new_edition_advanced_student_book.pdf
    • http://widusop.atwebpages.com/35775604559.pdf
    • http://tafiwepamubov.atwebpages.com/zunolifexi.pdf
    • https://uploads.strikinglycdn.com/files/e49d619f-b6e0-4dff-8827-838ecfefe25a/integration_of_x_dx_a2_cos2xb2_sin2x.pdf
    • https://uploads.strikinglycdn.com/files/2620528e-66cf-4505-a737-84473f39286d/29682092502.pdf
    • https://uploads.strikinglycdn.com/files/32ad62ca-dd7b-4fd0-99df-4828e9fd3b39/78694535488.pdf
    • https://uploads.strikinglycdn.com/files/530f04eb-0540-43d2-b545-7cb4c26ecf39/wonegazakomamogiwazoputa.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_off000145dd.bin
151ebb86418a0d9031d0dcd4e54de80f62e7dfce58a1a3b3d3abb96469648da3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x145DD 5472 bytes
font_01_sfnt_off0001586f.bin
4e616c5631e6e1987c5a0c90293717e751c983690f13216a94560189b1e90070		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1586F 12452 bytes

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