Malicious PDF — malware analysis report

Static analysis result for SHA-256 16277740aa7161df…

MALICIOUS

PDF

41.9 KB Created: 2020-11-01 05:08:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 4cdf936be055e3fe9f7f76a2dc10a936 SHA-1: 8ce3d29c5e93cad62f7b7a040c18189f9720a504 SHA-256: 16277740aa7161df6168b2d4146f57ebc3cef106652bec4a3fd5a8bb43b5adfe
142 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gettraff.ru/aws?keyword=scary+stories+to+tell+in+the+dark+dvd+release+date+uk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f873813be8bc.pdfIn PDF document text
    • https://xakexoxos.weebly.com/uploads/1/3/4/3/134307698/kubafunopude.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414852/normal_5f968a37eaf49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414332/normal_5f96e79c1b233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425933/normal_5f98faa5076d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369648/normal_5f8b4a99698e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dda40d83-48b3-4601-8238-0731dc409e2a/mucho_ruido_y_pocas_nueces_william_shakespeare.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/hs_codes_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7215ff90-cbf3-48e3-80de-dcb00b1205a5/seigneur_jsus_envoy_par_le_pre.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/atlas_of_human_anatomy_for_the_artist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08cf187c-5b60-4ff7-bc53-1d55830feb93/10329255317.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/concrete_admixtures_handbook_properties_science_and_technology.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/sivepulinaxaxoxe.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_off00006189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6189 5356 bytes
SHA-256: 86f348c7e2408cb9e337423aef33efec5f457ba553e7fcc0af57295ed0575473
font_01_sfnt_off000073c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73C2 11652 bytes
SHA-256: b2c5d8d3accd181361cefba0e46db85625d95ec7f23b6927eaef0dea1ac7464e