Malicious PDF — malware analysis report

Static analysis result for SHA-256 af280b13f8fe0f49…

MALICIOUS

PDF

50.4 KB Created: 2020-11-04 07:19:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 5b9b5f8449ef1ca0a7112f54e3851a19 SHA-1: 46c863706ecb1828486a8e414f4fc07e070119cf SHA-256: af280b13f8fe0f496f883f43f39566ed03fd10a78078a650e167f85d54731350
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/aws?keyword=unblocked+games+k10+zobopocilips In PDF document text
    • https://pavaliwakugaban.weebly.com/uploads/1/3/4/3/134373235/faligaseki-bunovizawajif-fowoj-lorojeru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5fa1fb29c7a2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381756/normal_5fa090cac8812.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/subud/wevitogajowawapuj.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/40118979551.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/69945438400.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/9917146895.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/93020505098.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfe4323a-9328-4c2a-a252-cad095f5ed66/verbe_aller_au_prsent_de_l_indicatif.pdfIn PDF document text
    • https://s3.amazonaws.com/konimowu/82090563096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97676f3d-6983-4d0b-b542-081f21d1d7f3/24436991469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a848d31a-3f58-44fa-8bf9-92a0f59860b7/relajodebopifujosov.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D7A 5736 bytes
SHA-256: e7caa6127a2ab65b27da4eadc229d2260b0c415b92622156a6b1e8ff73ea7efa
font_01_sfnt_off000080fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80FE 12732 bytes
SHA-256: 34aac43b43abe1352029a9faaa8dda2c77a33c0371d306db344fe339dbdc2070
font_02_sfnt_off0000a7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7BE 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e

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