Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8e469294aa59680…

MALICIOUS

PDF

90.5 KB Created: 2020-11-05 21:45:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3b24eb6a73dbb2023ad36c896fa57f25 SHA-1: 2fd52f36f8cb32763ac1249e9ffbb297c34402d5 SHA-256: a8e469294aa59680491dbb261ff92d453b165cf7fff07e055b71daaa827e9e0a
184 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 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 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/123?keyword=the+gazette+kai In PDF document text
    • https://niparazuxadema.weebly.com/uploads/1/3/4/0/134040736/865c662fb206f.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/bokaxafixizan-wakodoxabuwo-tebamimisak.pdfIn PDF document text
    • https://ralubimuxafoku.weebly.com/uploads/1/3/4/3/134373731/4353727.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f8726ca5bb77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380857/normal_5f94d4b8c706a.pdfIn PDF document text
    • https://dexoxewivovevub.weebly.com/uploads/1/3/4/3/134322619/eb62008dbf3.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/tiriramuzawavam.pdfIn PDF document text
    • https://sunawakajisume.weebly.com/uploads/1/3/4/3/134324988/zubate_xefuf_togufigob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393893/normal_5f8ebb714cf51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409811/normal_5f9454f9ad722.pdfIn PDF document text
    • https://getedizexagan.weebly.com/uploads/1/3/0/7/130740146/9d12978a329d8.pdfIn PDF document text
    • https://givovirudodax.weebly.com/uploads/1/3/4/5/134587764/mafesujevejimut.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/76e57042-9551-4adc-afc7-f59ed175b92e/42935682733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beac195a-91d5-419d-832a-cbba807f9339/mofunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbb69b10-8520-49de-b1dc-5229da3e3930/xozuganejimefizet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD98 23948 bytes
SHA-256: efb14a6bdf029346b321a01fe33e81fb570c45aacac7446135550fb282a5b2e7
font_01_sfnt_off00011858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11858 4704 bytes
SHA-256: 4400151ef6d3b7dbcae56a6592b0fd418e7d883796c1d1d503f16cf7d4978190
font_02_sfnt_off00012867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12867 16908 bytes
SHA-256: d59bbbc1d686b0a1a80970bce4781a0aa58b11443a976d5e67ef1c2faac467c9

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