Malicious PDF — malware analysis report

Static analysis result for SHA-256 d840b4a28205e00a…

MALICIOUS

PDF

64.7 KB Created: 2021-02-18 03:20:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1531a0df5a1f63c1c3bd698501fa85fc SHA-1: b88c634e005b69b2e4c5469a8f1ff01b4576a4d8 SHA-256: d840b4a28205e00a8b1150c090172ae7d273604cbbed51135e6c28be721414da
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=prentice+hall+geometry+book PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489407/normal_5ff91bc57fdca.pdfIn PDF document text
    • http://hotelhouze.ru/call_recorder_pro_mod_apkn5xln.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_60130fd3531a7.pdfIn PDF document text
    • https://cdn.sqhk.co/jiguluzufuwa/hhhgj7A/call_of_mini_zombies_2_hack_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481058/normal_5feb8ae0e5faf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416921/normal_5fc8803b8a32c.pdfIn PDF document text
    • http://wopivobozas.66ghz.com/angular_formatdate_function.pdfIn PDF document text
    • https://cdn.sqhk.co/sulubejes/ja6ShcL/64490040237.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxumududu/Ryic323/36188577470.pdfIn PDF document text
    • http://prequester.online/mamovefubilegem6zw8.pdfIn PDF document text
    • http://g2am2e.xyz/rich_dad_poor_dad_download_audiobookexp97.pdfIn PDF document text
    • https://cdn.sqhk.co/tisewesir/uic4jdi/recreated_zx_spectrum_bluetooth_keyboard.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369499/normal_600ba64c769ce.pdfIn PDF document text
    • http://sarkife.site/84506911745hfcbu.pdfIn PDF document text
    • http://presalle.xyz/appula_apparao_songs_free4ve8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_600b8ffc8e5ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467030/normal_5fcef01b7f4a5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zasepo/66155324051.pdfIn PDF document text
    • http://wowifimeziv.rf.gd/hiv_testing_guidelines_cdc.pdfIn PDF document text
    • http://zilidezokap.epizy.com/ps4_media_player_apk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB500 5132 bytes
SHA-256: c2021e0921a4baab3f7bb29684e706b854b810b6cc4140f7761b65731239a1b1
font_01_sfnt_off0000c641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC641 9724 bytes
SHA-256: 1e661f32ee752503060f6ff506465c46ab58088dbc5dbd4c6c5b878c0bf93b27
font_02_sfnt_off0000e78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378