Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d4790a28fec2834…

MALICIOUS

PDF

70.8 KB Created: 2021-03-01 19:08:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a7c2d3fae7af0cde72a72736e9b23b86 SHA-1: 75b5774408aff3c1eff943ba9bd33ff672d31faa SHA-256: 4d4790a28fec283413bcd2c99f64a6d27bf2b2f3ac8fc95756220fc1a15e7fd1
146 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://kuzutuzo.ru/award?keyword=dsc+alarm+manual+time+change PDF link annotation
    • http://presalon.xyz/rijigemumekabadumet9mwro.pdfIn PDF document text
    • https://litaxavuve.weebly.com/uploads/1/3/4/8/134848922/desexewuvemezi-zonivagixokaw-talimit-naduzozem.pdfIn PDF document text
    • http://copyright-help-report.com/centrifugal_pump_operation_manualc81hh.pdfIn PDF document text
    • http://nigasheff.xyz/manual_de_cabala_practicad3eho.pdfIn PDF document text
    • https://xirabefutabo.weebly.com/uploads/1/3/5/3/135323672/rubapafegufemam-dizugad-saxerukotobiros.pdfIn PDF document text
    • https://renezotutumiw.weebly.com/uploads/1/3/5/3/135343322/jozasawule.pdfIn PDF document text
    • http://wonder-ita.space/ejemplo_de_proyecto_de_investigacion_educativowpx50.pdfIn PDF document text
    • https://sidutoxa.weebly.com/uploads/1/3/4/8/134886075/b8cbcba2.pdfIn PDF document text
    • https://migijulomav.weebly.com/uploads/1/3/5/3/135394851/kitivakibixe-tiwagume-josoxen.pdfIn PDF document text
    • https://buronoveze.weebly.com/uploads/1/3/0/7/130739674/fuwevegosamivax.pdfIn PDF document text
    • http://com-signto2.xyz/chambers_21st_century_dictionary_freej6fzf.pdfIn PDF document text
    • http://nunakazesimu.22web.org/amd_bios_update.pdfIn PDF document text
    • http://werenntaq.online/color_atlas_of_histologyl3ypz.pdfIn PDF document text
    • https://tojaxufuvubugo.weebly.com/uploads/1/3/4/6/134641466/1688978.pdfIn PDF document text
    • http://tonagruz.ru/72398054560svztw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://litaxuroba.rf.gd/xufojamidafuv.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/face_app_apk.pdfIn PDF document text
    • http://wijijatalil.epizy.com/54739099052.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/fexiv.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/trigonometry_formulas_for_class_10_mp_board.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/fijenetakomusafor.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/95308274228.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_off0000d85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85E 5212 bytes
SHA-256: b24d240579a3deb683f4376c295ca743e8bc33d0a4b17ab9ae328af1aa889e5c
font_01_sfnt_off0000e9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F4 10400 bytes
SHA-256: 72b6f9b155d5b5a78921abc4523e30cdf53e38954ec8a0586f4942a997b3b949

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