Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f053394cabd3362…

MALICIOUS

PDF

67.5 KB Created: 2021-03-23 15:53:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27d924438311e8f6b280e9571c9096a0 SHA-1: ed90129f32c5684fc1d72aae5dbb4433180b5983 SHA-256: 9f053394cabd3362070a9e28ffb114d448a62bda6a2bf960faf8ce472600767e
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, which is a common lure for phishing attacks. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious site or downloading a payload.

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://dafemum.ru/award?keyword=atomic+structure+pdf+answers
    • https://static.s123-cdn-static.com/uploads/4368474/normal_5fccd127f02cf.pdf
    • http://lisolu.org/51757945965zfujf.pdf
    • http://zejizeb.22web.org/bms_performance_glasgow.pdf
    • https://cdn-cms.f-static.net/uploads/4497646/normal_6013d98bd7e6b.pdf
    • http://winoorama.website/how_to_update_firmware_on_arris_surfboard_sb61837nv50.pdf
    • http://prizinsta24.space/pizeguweka14i6e.pdf
    • http://summ-green.fun/3319828906oytj1.pdf
    • http://securityverifiedservices.com/what_business_can_i_start_to_make_millionsp3fs9.pdf
    • https://cdn-cms.f-static.net/uploads/4420752/normal_6041622f99d98.pdf
    • http://vittorguxx.site/veramuzanerazizatorepejr1.pdf
    • http://sellforce.ru/genie_superlift_contractor_parts_list075w8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/db6da15d-2bb6-41eb-bb4d-66beb6cf0c97/cabelas_pro_series_dc_meat_grinder_parts.pdf
    • http://lijukogibedatu.epizy.com/53201678169.pdf
    • http://pirinuraxi.rf.gd/ramoj.pdf
    • https://uploads.strikinglycdn.com/files/41b3a5df-f6cd-4dda-8e0d-a64000609912/18675158664.pdf
    • https://uploads.strikinglycdn.com/files/5babed49-532a-433f-97f7-6f0daf73dd68/where_can_i_go_on_holiday_abroad_in_august.pdf
    • http://wosaxadef.rf.gd/megalovania_trombone_solo_sheet_music.pdf
    • https://uploads.strikinglycdn.com/files/e63d721d-d22d-440a-9493-c31f7cf7bb81/vajadiwepexoletekikana.pdf
    • https://uploads.strikinglycdn.com/files/09dcee03-2511-4bdd-8133-96bf09c39e3e/zotoxibijijilim.pdf
    • https://uploads.strikinglycdn.com/files/319f2d5d-c604-4b72-b5bc-ecf8b37dc600/57450925333.pdf
    • https://uploads.strikinglycdn.com/files/d31c96de-b053-4e00-8609-cd01515085e6/7238691314.pdf
    • https://uploads.strikinglycdn.com/files/ea5967a1-c91c-49ea-a875-2ebc6b15fd7f/2967962840.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_off0000c959.bin
e6cf098e6baebe46b8ccd59cde792e0f9e291b3adad50272695ca3390f033097		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC959 5348 bytes
font_01_sfnt_off0000db86.bin
9c16000450ee869abb2dee44fa1ea22fa021a784faddcf9e8be13521b212c3e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB86 10876 bytes

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