Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa8271f7a17aa9f1…

MALICIOUS

PDF

40.9 KB Created: 2020-11-03 12:45:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 174bb1998b4c5f002f293e19fa9d06d6 SHA-1: 086027312d327723ff88d79fc7c0fd3514ef002e SHA-256: fa8271f7a17aa9f1b863abbe8b6c49ea8c17d69fdaad2b51fce7c9e867a4af3b
170 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. It uses an invoice-themed lure and an urgency-based lure. 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 6

  • 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.
  • 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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=define+due+date+upon+receipt In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375356/normal_5f92753a6cfe9.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/5401885.pdfIn PDF document text
    • https://tojogemul.weebly.com/uploads/1/3/4/3/134360812/babego-regasu-kozebemasaje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379229/normal_5f8ef2bd57320.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378857/normal_5f8d9fe91f218.pdfIn PDF document text
    • https://sonuboguf.weebly.com/uploads/1/3/4/3/134310015/murixaxedu_tubeviletijete_sorag_renexer.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/lakutidunaxoge.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/79f112f3-3ac5-4c37-8909-6596b1dcd039/67121833047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6bc0b12-aac5-4007-8228-45b123bf365d/58432927315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9908e96a-390d-499e-a3d7-a5ab1bd2567a/magic_blooded_template_from_dragon_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7533730a-45fe-483d-92ac-fda7b9940895/56990737031.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_off0000640d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640D 4940 bytes
SHA-256: 07ccdf4dbe638bf31d5003533f576621005523cb7590264dc8ba42e1b51cec85
font_01_sfnt_off000074f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74F3 10076 bytes
SHA-256: e1f4a46d21640bed54134c69b1772b3222bf8d7232b5a574fdaa9792af4df864

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