Malicious PDF — malware analysis report

Static analysis result for SHA-256 a53522208358666a…

MALICIOUS

PDF

77.6 KB Created: 2021-03-28 10:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60b63f8adc257f9cc93830a79ea4474d SHA-1: 76401bffe44db7963691e0dd76eb9477259a2bfc SHA-256: a53522208358666afc5695b2db0bb3cf5bda46e92bc6b6eec634dafae4093168
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that leads to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to the embedded URL, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=livestock+farming+in+south+africa+pdf
    • https://cdn-cms.f-static.net/uploads/4370767/normal_5fdb3fe46980e.pdf
    • https://static.s123-cdn-static.com/uploads/4447270/normal_5fed5fe8de94e.pdf
    • http://jawixogu.mygamesonline.org/waselokakiwokekiwanoj.pdf
    • https://static.s123-cdn-static.com/uploads/4457320/normal_6009781f2cc94.pdf
    • https://cdn-cms.f-static.net/uploads/4443341/normal_601bfa8087551.pdf
    • http://jakufodunod.getenjoyment.net/the_visual_encyclopedia_of_science_fiction.pdf
    • http://bomaduworofa.medianewsonline.com/can_spread_betting_be_profitable.pdf
    • https://cdn-cms.f-static.net/uploads/4421781/normal_605f5e48743b1.pdf
    • http://fobexugelego.getenjoyment.net/mapud.pdf
    • http://pusovemolexed.scienceontheweb.net/zagawulobuzejenaka.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://memamawu.onlinewebshop.net/bossuet_sermon_sur_la_mort.pdf
    • https://s3.amazonaws.com/wuwabobujasivor/63464760909.pdf
    • http://sasaxunofob.atwebpages.com/words_with_silent_letters.pdf
    • https://s3.amazonaws.com/gixirojozogufux/moment_date_format_hour_24.pdf
    • http://kujazidi.epizy.com/cisco_nexus_9000_vrf_configuration_guide.pdf
    • http://wumipuxupixak.epizy.com/14209870086.pdf
    • http://vepitejususas.atwebpages.com/our_bucket_list_adventures_a_journal_for_couples.pdf
    • https://s3.amazonaws.com/tufitijinexu/36080843661.pdf
    • http://duxurulokij.epizy.com/historia_do_brasil_livro_boris_fausto.pdf
    • https://s3.amazonaws.com/fuwenoxuzasila/information_about_lifestyle_diseases.pdf
    • https://s3.amazonaws.com/posufij/91044795753.pdf
    • http://zadupomepinedo.rf.gd/aerosinusitis_adalah.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_off0000ef5a.bin
cf1b3eb11051653390846ba987104fb8fd5aa8d346bdf7c132edfd49333afc32
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5A 5604 bytes
font_01_sfnt_off0001024c.bin
e4884261f6e4df05472cf90d1e262018f4c7aa59f1dd226192ba610b163caefc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1024C 11420 bytes