Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7a6ace82ef957b0…

MALICIOUS

PDF

47.6 KB Created: 2020-11-07 06:54:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c0c88f16d73bdd156b5e00fd845439c6 SHA-1: 2b9218ac1b1c8c02ef30a541bde0395ff6f8ef07 SHA-256: e7a6ace82ef957b08f9431442cb6bc87361842196e4dd4b156902da9ef31c696
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 1.0000

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/aws?keyword=dnd+5e+monk+stunning+strike+saving+throw PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414682/normal_5fa59fda70199.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383795/normal_5f8bd7beba68d.pdfIn PDF document text
    • https://xinusikavafomi.weebly.com/uploads/1/3/4/3/134353784/wuroxipomumenutit.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/333677.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/5498dacd5.pdfIn PDF document text
    • https://folanejo.weebly.com/uploads/1/3/0/7/130776558/4b94c.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/095b946c-5bda-4baa-91e7-7fb4ec92f0b9/anonymous_se_lhe_cai_a_mascara_versi.pdfIn PDF document text
    • https://jarakapirapi.files.wordpress.com/2020/11/63415924238.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/eric_s_ice_cream_factory.pdfIn PDF document text
    • https://xujimave.files.wordpress.com/2020/11/lixetorukafowogabiwev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40363ec9-ed03-447b-99a6-d610e47a4e9c/20033734446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a3e1b7f-de2a-4b4f-a545-8f0a81b0ebb7/53412963382.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_off00007b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2F 5544 bytes
SHA-256: 7aa39c9683bff85ef9f69fd6da9761b3e95b19936c63e470f44c99d909ec4b20
font_01_sfnt_off00008dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DFB 10264 bytes
SHA-256: 6ff20b251435c033d2fa957e18c4d440b17e15835f1cb395dce56b2f2f83e07c

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