Malicious PDF — malware analysis report

Static analysis result for SHA-256 784d5385bfc2aaec…

MALICIOUS

PDF

243.3 KB Created: 2021-05-30 20:37:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6e122faea675c9f2512a840e944a2153 SHA-1: 5a9733b9c325ffc612a4f6b0961e11cdc03ce15d SHA-256: 784d5385bfc2aaec50c7e42e6d5f717dc9af95f7a848a4981bd0712860f5e8bc
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://bologen.ru/strik?utm_term=sat+december+2019+international+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393893/normal_6022d824230cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460678/normal_5ff302f242214.pdfIn PDF document text
    • https://xubivolimoba.weebly.com/uploads/1/3/0/7/130740090/jagibum_sevedopi_jadubaripe_nebovuwowefuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485440/normal_600dfd8581107.pdfIn PDF document text
    • https://xajufaxisadu.weebly.com/uploads/1/3/4/5/134585978/jomibojubezinujefak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409113/normal_6031ad5d2ae54.pdfIn PDF document text
    • https://vifunufuwo.weebly.com/uploads/1/3/4/5/134596702/gebafalinek-kobojapu.pdfIn PDF document text
    • https://bopuwivotapupo.weebly.com/uploads/1/3/4/7/134745193/9751494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370764/normal_6054e44467fa0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418567/normal_6009f227decbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487902/normal_606df5a81e72d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454162/normal_6024612136722.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447086/normal_5fed3504ceb32.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/51d8738d-913e-4e94-8f23-2030b8def6ec/narizupusonukaxopovudizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa4a360e-6ca9-456a-a422-2632259eec32/eleven_rack_editor_white_screen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b705a81c-0176-4cce-aee9-8044b7a85958/60378228394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/510ef0bd-772b-4be6-a94f-d53da806c698/37109294959.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a991cee-cda6-4e7e-afb5-585b703f05a0/76572545731.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cb46618-90c0-4537-bb94-636d410c23c1/how_to_make_a_battery_charger_from_a_pc_power_supply.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c2b22a2-c702-4cdc-99f1-a8c2ddf849e6/the_anatomy_coloring_book_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4274cbaf-aab8-4620-bb3b-23f876525dce/7498981382.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000103ff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x103FF 218348 bytes
SHA-256: 1360f12d48a0965644e9866b06af8b493001061339dcbc88aef3b7be1614a0c7
font_01_sfnt_off000384a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x384A7 5900 bytes
SHA-256: 587c8bd11b5429a5b0f65d8e8db714958f4d27b63cfe49647e406541b5359205
font_02_sfnt_off000398af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x398AF 11132 bytes
SHA-256: 6462008dd665d0047cc31693664ed2cbd940c1818252cebc9d0495f0b8530859

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