Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef2805dd6247576b…

MALICIOUS

PDF

83.4 KB Created: 2021-03-11 08:47:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 7bc6002f49f16959078df64f1879089a SHA-1: f1ba4253812c31d4a0e06fc5edbe5a192af64645 SHA-256: ef2805dd6247576b196356cc3f69def609013659c9cb1f30127750ab38744e23
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and multiple other unknown URLs were extracted. The ML classifier and ClamAV detection strongly indicate maliciousness, with ClamAV identifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to academic notes, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://seumenha.ru/award?keyword=bsc+2nd+year+physics+notes+pdf PDF link annotation
    • http://aydym.club/how_to_get_freelance_design_work_ukgo8hh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443617/normal_5fcbf71640981.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/10242704414cenx2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5fdb9a443a793.pdfIn PDF document text
    • http://item-get.top/ancient_greece_things_to_makeakmam.pdfIn PDF document text
    • http://twitter-center.com/951030444388rqnr.pdfIn PDF document text
    • http://nazhivy.net/14237464001fr6s6.pdfIn PDF document text
    • http://duplicwcnj.space/gigofuzubiwilusunojeruxgp7o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487918/normal_6027765833edc.pdfIn PDF document text
    • http://springital.fun/aditya_varma_bgm_ringtonet5g58.pdfIn PDF document text
    • http://beautysss.site/chess_pieces_moves_chartuaj1d.pdfIn PDF document text
    • http://7lessons.website/ramesuzofufokibalipujanzt2lq.pdfIn PDF document text
    • http://zekaxezixil.medianewsonline.com/how_to_avoid_dizziness_on_a_plane.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/nikon_f5_manuale_italiano.pdfIn PDF document text
    • http://vozobatenaw.mywebcommunity.org/36542413651.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/21bc8ccd-9199-49ed-b49a-5ebdadbec8b1/divovipamudojuju.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/missguided_playboy_tops.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/paf_college_lower_topa_admission_form_2018.pdfIn PDF document text
    • http://zimopup.myartsonline.com/10063070987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6e58070-84ab-409f-be6a-2655cd51e28e/73429460884.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/adjective_form_of_agreeably.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/mp4_video_cutter_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/62177619894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cd00045-6ced-40ff-af06-efab642432de/algebra_lineal_matriz_inversa.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A9 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off0000fa90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA90 5496 bytes
SHA-256: a62056163e88dcec7fae94318327fc53f73c44d1ffeb98974356d025a9b96878
font_02_sfnt_off00010d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4C 3204 bytes
SHA-256: 35c0a746fcdf55e64f2ba55209f6a139fa5d4ea47dce36c63c78d1e6d66b29b6
font_03_sfnt_off00011a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A45 10424 bytes
SHA-256: 9f39ba4904b88d33e788b93a31a4cedc69e4a9aa3d3d867e29cc3244dc0181c9

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