Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa821ddf14d13c77…

MALICIOUS

PDF

76.0 KB Created: 2021-03-29 07:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbb8cb8a8df1fd555a76e1725c1d0bfc SHA-1: 9dff8384cd86e54c895670ffc906a7e33629641a SHA-256: aa821ddf14d13c774a73cc76cf69d8e56d24961749fe0b58097f507a78ca8185
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be related to the search query, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/award?keyword=abandono+escolar+causas+y+consecuencias+pdf
    • https://cdn-cms.f-static.net/uploads/4448744/normal_605d12e80faf0.pdf
    • https://cdn.sqhk.co/mezugifosa/hg2jcU1/woodworking_vise_installation.pdf
    • https://cdn-cms.f-static.net/uploads/4405184/normal_604dde2926738.pdf
    • https://cdn.sqhk.co/fefamuve/HfidUfU/weather_for_wear_os_android_wear.pdf
    • http://keep-travel.com/felamavirifeporufopp0.pdf
    • https://cdn-cms.f-static.net/uploads/4406771/normal_601344924d2cc.pdf
    • https://cdn.sqhk.co/nigezufi/cHzjfjh/virtual_piano_with_notes_names.pdf
    • http://anarchymedya.com/mapa_fisico_de_america_del_sur_para_imprimir909i9.pdf
    • https://cdn-cms.f-static.net/uploads/4380857/normal_60593b995af75.pdf
    • http://save50.pro/what_is_the_relationship_between_the_elements_of_digital_art_and_the_principles_of_design_brainly129m0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jolozidabi/bailey_and_love_mcq_and_emq.pdf
    • https://s3.amazonaws.com/gurafoga/les_carnets_de_julie_recettes_livre.pdf
    • https://s3.amazonaws.com/metakibeme/personnel_management_policy_and_procedures_manual.pdf
    • https://s3.amazonaws.com/kisagoz/skripsi_pendidikan_islam.pdf
    • https://s3.amazonaws.com/muvojugejoxip/zapowilatinokiti.pdf
    • https://uploads.strikinglycdn.com/files/8fa07845-3f19-40a8-9707-2c53e8c10bbe/how_to_write_a_fitness_instructor_bio.pdf
    • https://s3.amazonaws.com/xapota/tipodexedopebajef.pdf
    • https://s3.amazonaws.com/jenagubadopi/blue_cross_blue_shield_provider_forms_mn.pdf
    • https://uploads.strikinglycdn.com/files/1329f436-f490-45a7-8fe8-488b10be697c/delta_22-560_carbide_blades.pdf
    • https://uploads.strikinglycdn.com/files/a0ec4520-1ec0-455a-9cdd-8cbcfe507205/ford_mustang_gt350_for_sale_az.pdf
    • https://s3.amazonaws.com/xazarujokemus/lanis.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_off0000e7a0.bin
1afac0a1f95c3ee4471633e7d800301e396f4ac7c1f6c687204c125326647a42
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A0 5380 bytes
font_01_sfnt_off0000f9ff.bin
e8493a0787cb93238a5875d5c4925f0ef7d25616ef60854bf797b8413b7c2147
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FF 12252 bytes