Malicious PDF — malware analysis report

Static analysis result for SHA-256 44d1e8ca08018f4d…

MALICIOUS

PDF

86.8 KB Created: 2021-04-05 22:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 387e69f24e8ecb8e5e8b2c9d697d46d1 SHA-1: d9056e73eb079878dc8539f3683277a0a6d9b02e SHA-256: 44d1e8ca08018f4d948e04eedb7c097d8665c4fce1ce452a1731d2a1cf9099dc
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 page claiming to offer answers to a Cisco academy exam. This is a common phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a phishing page or further malware. No scripts were extracted, but the PDF structure itself facilitated the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/123?utm_term=cisco+academy+exam+chapter+1+answers
    • https://cdn-cms.f-static.net/uploads/4376374/normal_60127b42b9eee.pdf
    • http://nomokesus.sportsontheweb.net/articulations_a_unlv_rhetoric_and_reader_2nd_edition.pdf
    • https://cdn-cms.f-static.net/uploads/4490272/normal_5fe9c562f2aa1.pdf
    • https://static.s123-cdn-static.com/uploads/4422144/normal_5fcddc663c314.pdf
    • https://static.s123-cdn-static.com/uploads/4371786/normal_5ff6585f6c5f6.pdf
    • https://cdn-cms.f-static.net/uploads/4496014/normal_60599d554f1f5.pdf
    • http://bcpreactiva-enlinea.com/plate_heat_exchangers_design_applications_and_performance_downloadw7vx5.pdf
    • https://static.s123-cdn-static.com/uploads/4412161/normal_5ff44a2c41ddf.pdf
    • http://loneresel.mygamesonline.org/76531787237.pdf
    • https://static.s123-cdn-static.com/uploads/4446036/normal_6007d1e3315cf.pdf
    • http://rm-swis-mine.com/juwaguzulomajudujelajugekwidt.pdf
    • http://arthromedro.xyz/348384608637hbqy.pdf
    • http://profyhouse.ru/braun_silk_epil_7_manualzm976.pdf
    • https://cdn-cms.f-static.net/uploads/4490122/normal_601ba74492972.pdf
    • http://vizionsmc.net/17693179145smlc1.pdf
    • http://genusadnlo.space/10587033958qusm8.pdf
    • http://dresdenpharma.ru/tipos_de_comunicacin_asertiva16txf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_7af396219b6248329d02b556113c1bb7.pdf?index=true
    • https://3176e400-c268-4dc0-8d69-08eae86937f8.filesusr.com/ugd/ea2f88_71ed7bfb1f874c4c8a564f0b943e7b8c.pdf?index=true
    • https://972af30b-04c2-4618-b911-83ba0b7fef9e.filesusr.com/ugd/84a5c6_aa8d527adf7a421b9a4893cc17fe796c.pdf?index=true
    • https://4f65703b-d4c0-4c9c-9e30-73c8cc83ec5d.filesusr.com/ugd/54fa57_4e6164df19a4429da0ac6686c28bad88.pdf?index=true
    • 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_off0001143c.bin
37f311289174c809b3287310833a61ff54d3b3c53fea8b0d353ae1c689df6a01
pdf-font-stream PDF embedded font (sfnt) at offset 0x1143C 5500 bytes
font_01_sfnt_off000126e2.bin
f8bc13aff2e8b85c2c1e52fd7c7451ba34d9120b1692f7bc650cefe06feb876a
pdf-font-stream PDF embedded font (sfnt) at offset 0x126E2 11404 bytes