Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d3fd383a95ecded…

MALICIOUS

PDF

76.8 KB Created: 2021-05-07 04:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6be545b1f4ac23ad8f3e0821d78e4a18 SHA-1: 1124256ea02c34b430f5414a7c576f2b0666e16e SHA-256: 2d3fd383a95ecded14171444fb4c127d046905671d017647e9f1e953ac6fac00
136 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary IOC is the redirector URL, which is likely used to host the phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://resalured.ru/strik?utm_term=free+ekg+book+pdf PDF link annotation
    • https://jedawakebikota.weebly.com/uploads/1/3/4/7/134715316/b5f82ac.pdfIn PDF document text
    • http://kosolibanun.iblogger.org/xanakularutuvemenuwogeja.pdfIn PDF document text
    • http://dabiboniner.22web.org/97558797757.pdfIn PDF document text
    • https://jokonufukitis.weebly.com/uploads/1/3/4/3/134399540/eccc34453fb8cc.pdfIn PDF document text
    • https://masizomomom.weebly.com/uploads/1/3/2/6/132681315/jubukasek.pdfIn PDF document text
    • http://segepivo.22web.org/static_banking_awareness_gradeup.pdfIn PDF document text
    • http://zajapokel.22web.org/agribusiness_risk_management.pdfIn PDF document text
    • https://zuveravovizopow.weebly.com/uploads/1/3/0/9/130969477/dd3ba771e57.pdfIn PDF document text
    • http://wemuwugisenoro.iblogger.org/xedawexepi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/geradi/wuzesovasalanunuxerufu.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/el_lazarillo_de_tormes_segundo_tratado_resumen.pdfIn PDF document text
    • http://dutebowoxaj.rf.gd/mamigevewobunivumonuzokid.pdfIn PDF document text
    • http://lavavil.rf.gd/90406099090.pdfIn PDF document text
    • http://merizipu.rf.gd/android_studio_ubuntu_18._04_launcher.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/autocad_drawings_2d_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/lusatuwofuvewisarusivuba.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/capitalizing_proper_nouns_worksheets_free.pdfIn PDF document text
    • http://miwufojo.epizy.com/22418775468.pdfIn PDF document text
    • http://pavinudoj.epizy.com/wosiloserinumof.pdfIn PDF document text
    • http://rivagajogitow.epizy.com/49716571525.pdfIn PDF document text
    • http://xanunomoz.rf.gd/accounting_ledger_entry_example.pdfIn PDF document text
    • http://buzaduvopixu.rf.gd/supreme_upvc_pipes_catalogue.pdfIn PDF document text
    • http://demosegepare.rf.gd/how_many_books_will_be_in_the_dresden_files_series.pdfIn PDF document text
    • http://tokavasetalan.epizy.com/jabunubamefitarugupiwex.pdfIn PDF document text
    • http://zopegekole.rf.gd/bus_interface_unit_of_8086_microprocessor.pdfIn PDF document text
    • http://nanivamiz.rf.gd/jokanulunuru.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE95 4948 bytes
SHA-256: 2b48dae6a6e9025ced07b85b253285377cebdb62476e5b2714035df78ead030d
font_01_sfnt_off0000ff85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF85 11076 bytes
SHA-256: 6478c5002222409fe71e8bb6c6a7886b91ab61cf4f1318cda9c8371563129c2a

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