Malicious PDF — malware analysis report

Static analysis result for SHA-256 25bd690cba34352a…

MALICIOUS

PDF

72.7 KB Created: 2021-02-27 04:04:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 2036a0a6c4600e98aba008be41ff1e38 SHA-1: 6af67f8e734d415544b330c94efab835af418918 SHA-256: 25bd690cba34352a03b6fc137710353b92c5414a3c7bf5a4af9bd02775393f6c
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/award?keyword=how+to+change+oil+in+onan+generator PDF link annotation
    • https://cdn.sqhk.co/tajiwikiter/djb8hjF/fijamotixubibosu.pdfIn PDF document text
    • https://cdn.sqhk.co/mopewedote/YSicXhe/history_of_nigeria_musician.pdfIn PDF document text
    • https://cdn.sqhk.co/zokuwagopole/ihimSDe/59516453337.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/9iaSlij/face_mask_required_sign_covid_19.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/gfhchaf/80243070458.pdfIn PDF document text
    • https://cdn.sqhk.co/wenewojufaj/jcjdeja/secure_folder_app_apple.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/gjng3Wi/kaiser_covid_test_results_number.pdfIn PDF document text
    • http://dutuzam.iblogger.org/the_vampire_lestat.pdfIn PDF document text
    • http://xipanekoxejup.iblogger.org/the_choice_restaurant_gadsden_daily_menu.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/muwomapotumugi/how_to_use_celestron_astromaster_70_telescope.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/arduino_ide_manual.pdfIn PDF document text
    • http://dofumuligo.rf.gd/37565891916.pdfIn PDF document text
    • http://godutiliwaganos.rf.gd/climatic_zones_ich_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/bunaratupigikorotuxofap.pdfIn PDF document text
    • http://dekifovep.epizy.com/31268503979.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_off0000e23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23E 4936 bytes
SHA-256: 921c91c1fcb144ea84be457898dfc64c57cfe57bf198c5f87d8a7ed71ae33419
font_01_sfnt_off0000f314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF314 10240 bytes
SHA-256: a07f294ed7d4e843886c9c5d4d40b8412714432d0264dbfcf1a0a6a113fbbb15