Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c9c9308eafcaad…

MALICIOUS

PDF

47.8 KB Created: 2020-11-01 11:54:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e43b9e13bbf8bbfd163c66d88c9b75e1 SHA-1: dabb9736c2cb7c70256041019e3a18802b4f18a0 SHA-256: 65c9c9308eafcaadf063d9543ca1b3f223e6f1915c4e50644d659e8180c38169
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • 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.
  • 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/123?keyword=ancient+chinese+food+recipes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f87a678011be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386334/normal_5f8fc8e58dd69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372682/normal_5f9629019cca5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385847/normal_5f99302b56188.pdfIn PDF document text
    • https://terowibew.weebly.com/uploads/1/3/4/3/134370771/vabikijumula_tuzerabud_vijakar_zifepive.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381976/normal_5f917dad5b885.pdfIn PDF document text
    • https://silemixijotin.weebly.com/uploads/1/3/4/4/134463531/rexaterixol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f95a464446d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385014/normal_5f8d1d591fa38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368731/normal_5f8b08a0936ab.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/dinigugaxej/40460901500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5008/1689/files/weed_eater_twist_n_edge_rte115_manual.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67DE 4988 bytes
SHA-256: e323160a24235184782a43e2360c9a3c05ec148933a036babcd6e53a00915d56
font_01_sfnt_off000078d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D7 10440 bytes
SHA-256: c7f028b6211b094d511735753daa971859810b88381578d86d7753bc299a5628
font_02_sfnt_off00009cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CBF 16344 bytes
SHA-256: ed45a24507f18daeaf6b6e9cac20235e9e43bed88bc2d44b7621eff085e31190

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