Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7dab855273d9387…

MALICIOUS

PDF

70.3 KB Created: 2021-01-31 15:40:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a58efeaf3d933370be60850df201eafd SHA-1: 92c2f973ee286a49f18748797d13efa6da0ea7ec SHA-256: d7dab855273d938747b5f2db5a2cf35e6f3d4a4132892d4376bb83e60e9e46ce
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=pandora+one+android+apk PDF link annotation
    • https://cdn.sqhk.co/regavebike/geyjhie/star_wars_cast_2019_zorii.pdfIn PDF document text
    • https://fipoxojumudex.weebly.com/uploads/1/3/4/6/134649093/424175.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/djdgc9x/othello_sparknotes_act_2.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/hfjgQ58/snapping_shoals_bill_pay_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/govazilose/0VctrhO/lowe_s_department_store_nearest_me.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/1ihvOWt/wikawonenabugabubajulivip.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/QhfVIeT/uncertainty_equation_a_level_chemistry.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/idhavoU/aliexpress_coupon_for_existing_users.pdfIn PDF document text
    • https://cdn.sqhk.co/ropobemuma/Kfzghid/39381466472.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/fqZtifu/city_island_5_tycoon_building_download.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/gozilum/website_development_proposal_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/vanebotufokigelafijibuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/xusawu.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/78579243344.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/installer_boite_mail_free_sur_android.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_off0000d7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B0 4808 bytes
SHA-256: 385489c850c1ecdf9aae4d5226e199567fddbd6583f36e6a7ca20263a3151db9
font_01_sfnt_off0000e81a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81A 10736 bytes
SHA-256: 1bd0ff8bccc3fa0215a9bb5e324c3b9bf21269e8af7a549cb49d911c47f37bc0

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