Malicious PDF — malware analysis report

Static analysis result for SHA-256 527ebee7658d0d2f…

MALICIOUS

PDF

41.2 KB Created: 2020-10-29 04:10:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ede3e34a66f4fd5b412f1d4acfe5ff88 SHA-1: d6b5aec8ece9a1dd1a14888fc26c3e4a1ed367a8 SHA-256: 527ebee7658d0d2f3afcde35e9f83fd79360ff9eff25f9a1e51ff1ea0ff86bdb
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/strik?keyword=netgear+wifi+extender+ac1200+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375887/normal_5f93ebf042050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f87568ad924b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368762/normal_5f87f9223b87a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_5f881ef9ee145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407299/normal_5f992d8a2a25c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f9532dfd9720.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373004/normal_5f8dfb0d55540.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/6893834c-7468-4dd1-99b2-9caa238c35ae/39014502655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7166/7876/files/vajaleleligipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73fd1c54-40c5-4564-a9e2-3a30fc698945/56411757780.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3062/3894/files/libogodupuxilawil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0130/2168/files/51274850841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4e6c020-e606-4c14-8f96-a326e65f5619/36642038749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2931/8813/files/download_reader_for_pc_32_bit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7820/4574/files/bosulupesi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7275/6129/files/zisiniporixi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/8978/8572/files/etapas_del_desarrollo_visual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac89cf8a-b485-4bfe-b737-367fd28b8f74/4760838622.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3928/4126/files/5_point_scale_printable_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d97e258-6941-4b2e-961e-2486c2c365aa/neguboxupodepiliva.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_off0000618c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618C 5612 bytes
SHA-256: ecf0dfe705e75b64ea3c162cff6472a11b1b1d084fefd2d9e905be232a71339a
font_01_sfnt_off000074de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74DE 10048 bytes
SHA-256: a9f9e09734d750dab32f8b5aaaa913bd12ff28f74196ab0ec768078f4da99502

Open this report in the interactive analyzer, or submit your own file for analysis.