Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9054215b8e6682f…

MALICIOUS

PDF

46.1 KB Created: 2020-11-06 05:36:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5c6fa19db751e1dd603d524d58c9d3e9 SHA-1: d92bcb59ff56ca19c64ceadcc504c6fa22b695f8 SHA-256: a9054215b8e6682fe5bf159e7bbe556d9d3e9baad2cc717f9796efc075593c13
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://trafffi.ru/123?keyword=tappan+furnace+parts+manual PDF link annotation
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/debajonisus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375909/normal_5f8986be446fd.pdfIn PDF document text
    • https://fijefozumomaba.weebly.com/uploads/1/3/4/4/134491855/wogebadevuluni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_5f9267d5e36af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403128/normal_5fa0fc74b17e2.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/17c58c75-e1fc-42b4-9345-220487b178e4/77124430354.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/lime_sulfur_dip_petsmart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/4826/8473/files/puluwisivit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0586/0248/files/82245279982.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da6c3ce9-e801-4334-b04a-7e9918ed0c3c/little_tikes_castle_slide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1db00d10-22a0-43c8-ac32-bd833964182e/81417412505.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/advanced_excel_keyboard_shortcuts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a6aed33-0aab-45bf-943c-19faaf2a3a6d/medieval_queen_dresses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec2d6a90-199f-43fa-8342-dc2163a1ba71/foundations_of_government_section_1.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_off00007715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7715 5112 bytes
SHA-256: 42ecb4813d0852d55bba34ffad88c3a5f799db3a205a15f7e7d37fcd95cea101
font_01_sfnt_off00008869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8869 10308 bytes
SHA-256: b9b2edd050a4c4e3f62d09d29059fcb02d56afc3947e423fd0b73953f7f32e28

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