Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bee8c2c19ce59e2…

MALICIOUS

PDF

61.2 KB Created: 2020-11-08 14:11:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9b8730ec88098337c2793ab90ca3c230 SHA-1: d7a9c1bbc7ec04ea22a69b5bc8ba32e754a07ec7 SHA-256: 5bee8c2c19ce59e2db83923078b77bb3f0b454c4b47f6f292564d3c8c402fcc5
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://trafffe.ru/aws?keyword=penguins+of+madagascar+episode+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365567/normal_5f8735fd4818d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465949/normal_5fa26db221657.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bozuvemav.files.wordpress.com/2020/11/50660159253.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecc08047-1da9-4745-ac63-2dce27a3184f/jowiwub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dbc76a0-a2c9-4fd1-b1d6-e603d6b04a39/oc_artistic_landscape.pdfIn PDF document text
    • https://zufavenasefu.files.wordpress.com/2020/11/ableton_live_10.1.1_keygen.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/sokurefivorofidizofalufit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3cf84e9-53b2-4e68-b10c-adf5190ccd0b/babonetijepulajiledusova.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/wiboxemajaxejim.pdfIn PDF document text
    • https://tuxabavijig.files.wordpress.com/2020/11/37940387668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7c0c7dc-f11f-4064-983c-f944b9cf63c9/dd_xanathars_guide_to_everything_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14ab985d-9353-4f47-8abb-dc99487b09c4/contemporary_abstract_algebra_9th_edition_download.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/vuvemi.pdfIn PDF document text
    • https://tuzakeve.files.wordpress.com/2020/11/levamavutenataxa.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_off0000ac9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC9B 5444 bytes
SHA-256: 20da2842cd748703f0914e6f6cb575d45e3770ae39794b5274fe3c3f5b5008eb
font_01_sfnt_off0000bf0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF0C 12736 bytes
SHA-256: c793a06fc13bd9b65107e1e908c96a8a614e3ed53de98175c30761f839209533

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