Malicious PDF — malware analysis report

Static analysis result for SHA-256 287a8ef4cabbf89c…

MALICIOUS

PDF

72.6 KB Created: 2021-02-07 06:04:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 885c7a09b010dfb9a1dabd6b0cafe47d SHA-1: 08886cf1f007b294ad63272760563b438d144ce2 SHA-256: 287a8ef4cabbf89c2d04ba8062b4000fe5de6ccf698b8ca3ab30a1abe71c10f3
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://bologen.ru/aws?utm_term=instagram+video+iphone+shortcut PDF link annotation
    • https://cdn.sqhk.co/teposodigar/jc4E0Df/lego_elves_aira_dragon_name.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/Dzijjhe/tennis_racket_3d_model_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411944/normal_6013719bf0b96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410000/normal_601774ac1ae46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488336/normal_601b7876f3a1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374715/normal_5fe5e56fa1e81.pdfIn PDF document text
    • https://cdn.sqhk.co/noxavuris/EjhhdGd/equalizer_fx_pro_apk_download_free.pdfIn PDF document text
    • https://cdn.sqhk.co/temisexezoda/yhbGFhb/baxibakabamupa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485828/normal_5feb2e5c21ab1.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/jepavilutabilel/excel_vba_dim_sheet_as_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/oracle_apex_link_blob.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/vlc_video_player_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/biwewofapafesov.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/example_resume_template.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/40834011121.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_off0000dcfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFB 5452 bytes
SHA-256: de917501ab2d598a2e5b519e75cbbc56f05af82a1e0269ab204f1fffc2b4626e
font_01_sfnt_off0000ef67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF67 11368 bytes
SHA-256: ac6edd959ec1ba7e42631f603e67ecbaba86ad4103f3271ad21c3480fea000a7