Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8770de8b39b5d62…

MALICIOUS

PDF

81.0 KB Created: 2021-03-23 14:06:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 877af0a6f90dd4759c7fd2a9bae5acb4 SHA-1: ee2f9a3eab2fd38706b10f03ba659c57cef4aa63 SHA-256: a8770de8b39b5d627aee53f801814828524b75b913fd037536f5aa5af7b10f4e
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 suspicious domain, masquerading as a search result for a specific PDF document. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of an external URI and the overall detection profile suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/award?keyword=cartomancy+meanings+of+playing+cards+pdf
    • https://cdn-cms.f-static.net/uploads/4368956/normal_603f40579b5ff.pdf
    • https://static.s123-cdn-static.com/uploads/4416661/normal_5ffd567bb729f.pdf
    • https://sunudufexune.weebly.com/uploads/1/3/0/8/130874439/mumadujebevoxutex.pdf
    • http://wugegifa.getenjoyment.net/lorofejoraxawugedi.pdf
    • https://cdn-cms.f-static.net/uploads/4479439/normal_601fd27c381d2.pdf
    • https://monokuzofo.weebly.com/uploads/1/3/2/7/132741222/0bf7f1af60.pdf
    • https://menuwenuxunok.weebly.com/uploads/1/3/4/6/134682317/d56ba6c45.pdf
    • https://cdn-cms.f-static.net/uploads/4416500/normal_601d9c8230986.pdf
    • https://cdn-cms.f-static.net/uploads/4489061/normal_602fe68893510.pdf
    • https://cdn.sqhk.co/jigavozef/jDCibhc/doroxikawotaximefowigeb.pdf
    • https://cdn.sqhk.co/rumomezojeku/dZbhfhd/top_classic_rock_love_songs_of_all_time.pdf
    • https://cdn-cms.f-static.net/uploads/4388422/normal_5fd69a9b12679.pdf
    • https://static.s123-cdn-static.com/uploads/4451929/normal_5fe43cb217c6b.pdf
    • https://cdn.sqhk.co/liripudeb/drglN2A/global_hero_horse.pdf
    • https://rarasuxa.weebly.com/uploads/1/3/1/3/131398432/fixirudidipo.pdf
    • https://static.s123-cdn-static.com/uploads/4459322/normal_6009122a73666.pdf
    • http://dizurexemubegog.mygamesonline.org/world_map_with_continents_countries_and_capitals.pdf
    • https://static.s123-cdn-static.com/uploads/4502817/normal_5fca4b80f2a03.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bexovivuvere.myartsonline.com/divijasa.pdf
    • https://uploads.strikinglycdn.com/files/eda8840b-3e31-4b5b-ad76-76058288d7f5/37063192271.pdf
    • https://uploads.strikinglycdn.com/files/6b22aec3-5143-467f-b857-c822a60cc26d/jivizofumore.pdf
    • http://sopexalibip.onlinewebshop.net/51432688098.pdf
    • http://sukokovevaz.atwebpages.com/blog_de_libros_juveniles_para_descargar.pdf
    • https://uploads.strikinglycdn.com/files/dc3fe41d-ce6c-4745-808d-ae898e7d33ed/71445205254.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_off0000ffad.bin
29baf9705457f2d27768c930f00b9eea79abaa563b9c47b1c54de4085a26e1f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAD 5484 bytes
font_01_sfnt_off00011246.bin
42ed85418ab339aa7daf1786da5767a35058252e5e198f83c3ced2664646be2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11246 10636 bytes

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