Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb89a3840c0853a8…

MALICIOUS

PDF

70.9 KB Created: 2021-03-14 02:38:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54006c40dd9e4489055cf5cd39df01f5 SHA-1: b36b1a77a95a16c3eab923be84e5babca35fe71d SHA-256: cb89a3840c0853a8dda518210ebf61bd91c487905a9008cd1088187683edc257
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The embedded URL, 'https://pelibifir.ru/wix?keyword=burlington+elementary+school+billings+mt', suggests a phishing lure designed to trick users into visiting a malicious site. No scripts were extracted, but the presence of external URIs indicates an attempt to redirect the user to a potentially harmful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/wix?keyword=burlington+elementary+school+billings+mt
    • http://winoorama.website/parallelogram_worksheet_geometry80lym.pdf
    • http://zejirejajedudu.getenjoyment.net/tezipetomudajezesox.pdf
    • https://static.s123-cdn-static.com/uploads/4366399/normal_5fc7970e18688.pdf
    • http://zhigina.ru/warcraft_3_frozen_throneahd5q.pdf
    • http://iranianvc.com/5532704522n0yp5.pdf
    • http://winoxolupuvil.getenjoyment.net/reiki_level_1_attunement_procedure.pdf
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5fd2aceccf123.pdf
    • http://on-arenas.com/mughni_al_muhtajrwlhq.pdf
    • https://cdn-cms.f-static.net/uploads/4495691/normal_602433490a535.pdf
    • https://static.s123-cdn-static.com/uploads/4392853/normal_60040662ea4fd.pdf
    • http://hackins.site/how_do_you_add_improper_fractions_with_whole_numbersqksaa.pdf
    • https://cdn-cms.f-static.net/uploads/4460983/normal_60188b4fd598f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cab4e1fa-baef-471d-9b24-2275dc4b5d6b/rotuvakabopado.pdf
    • http://fajenadiwizowo.atwebpages.com/mabijuvejiwimuxaverara.pdf
    • https://uploads.strikinglycdn.com/files/47fd37d2-c59e-4efd-a14b-38e291f933e3/list_all_the_verb_tenses_in_english_language.pdf
    • https://uploads.strikinglycdn.com/files/f85de5d1-4631-4c67-b533-d39ea4063ad6/jabawujexumekakawaku.pdf
    • https://uploads.strikinglycdn.com/files/9b9e26c4-e51e-4805-9717-3c21de0e0554/computer_hardware__networking_course_in_delhi.pdf
    • https://uploads.strikinglycdn.com/files/bc536fe4-0304-4aeb-9f71-eb3960e0ff49/d_and_d_players_handbook_5e.pdf
    • https://s3.amazonaws.com/nefomojuwet/bafipakav.pdf
    • http://tavamikilav.myartsonline.com/blood_test_report.pdf
    • https://uploads.strikinglycdn.com/files/4e0d31c4-66ea-4913-80c9-c39d254136ca/probability_and_random_processes_by_s._palaniammal_free_download.pdf
    • https://uploads.strikinglycdn.com/files/01b93d9a-b411-4253-b6e1-f8a0249f9486/narufesobaxizonudekerida.pdf
    • https://s3.amazonaws.com/nonabafat/62198754187.pdf
    • https://uploads.strikinglycdn.com/files/25a03b87-c226-41cd-a846-bee2d224b0ab/lipozoxe.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_off0000d461.bin
965e591e529da957ff27749e726ec1d8bb25250a6d873125f3ea21180a7c6af6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD461 5504 bytes
font_01_sfnt_off0000e6f2.bin
c76538b99974013fa966ad0ae746a7517ee43e6631d21b2b22a64567293cf5f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F2 10780 bytes

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