Malicious PDF — malware analysis report

Static analysis result for SHA-256 c146a65e6bf5158b…

MALICIOUS

PDF

60.6 KB Created: 2020-11-10 19:54:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 9ecc7741dbb873606ba0a5bf0d2cd289 SHA-1: 5339c633d72fa59d9b5a3d6c321a60a573f2cc50 SHA-256: c146a65e6bf5158b95b075aeeae0fce36d748027e217ae04503bfb359d0b35f2
66 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 0.9996

Heuristics 4

  • 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.
  • 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=c+the+complete+reference+4th+pdf PDF link annotation
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/2478157.pdfIn PDF document text
    • https://vedegidimojota.weebly.com/uploads/1/3/4/5/134597995/lirapudubatigire.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/zusoxipawi.pdfIn PDF document text
    • https://wabozejitikaz.weebly.com/uploads/1/3/4/4/134495441/redepowisodegas.pdfIn PDF document text
    • https://gugabezari.weebly.com/uploads/1/3/4/5/134577353/girug_luwazu.pdfIn PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/dibixofodaw_gizavoteg.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/fasanag/20833886110.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/juxebuneroligidodobudo.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/70596636114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66f5a9a2-07ad-4f59-8178-433b6bc73e81/what_channel_is_fox_on_fios.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/91658455074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7841166-b025-4774-aac6-d84ed3d8ec56/newborn_photography_poses_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f09de79-bd8f-4fb6-b2fc-3a3a2c8ab4bb/98351063565.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/imam_bukhari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd88ab94-4f63-41c2-9412-3730b652db53/21560236190.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_off0000b147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB147 5000 bytes
SHA-256: 95745441acfd5ace3106b29229c358757433369693082b1686848c85f96a393b
font_01_sfnt_off0000c221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC221 10428 bytes
SHA-256: 1097c4a4b6ae78848b3c11d39eeb37beb2228149224f65028f4778f17a4df05d

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