Malicious PDF — malware analysis report

Static analysis result for SHA-256 2805feea650ff14d…

MALICIOUS

PDF

42.7 KB Created: 2020-11-06 21:38:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 9be887ac1ee7b46d365d12f9f4a3dd8a SHA-1: 0a2ab9385aa7ba4b0b501a36c86fbff7bc66463b SHA-256: 2805feea650ff14d1dacf4003752973ced4acc483caca5e46844be12fafb8180
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=download+adobe+illustrator+cc+2019+full+crack PDF link annotation
    • https://vesexifog.weebly.com/uploads/1/3/4/4/134491049/1176502.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/zemigiduwagafu/nixanineb.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/graphing_absolute_value_inequalities.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/wubusevonuxumepisureme.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/reremuradivuvevedivogobid.pdfIn PDF document text
    • https://fimalul.files.wordpress.com/2020/11/xenikefeg.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/fizimobaruweboratiweti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec6b4bde-7700-42a7-9193-805cedb285e9/fuzutasosonazowi.pdfIn PDF document text
    • https://naligujabe.files.wordpress.com/2020/11/panixonawojidugasirikiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2380c58b-fead-4115-8986-3e048f638280/35905459476.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/beam_design_formulas_with_shear_and_moment_diagrams.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/causes_of_antimicrobial_resistance.pdfIn PDF document text
    • https://xuxawota.files.wordpress.com/2020/11/20122779673.pdfIn PDF document text
    • https://mufetamutobe.files.wordpress.com/2020/11/43039138876.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/12217617601.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_off00006585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6585 5792 bytes
SHA-256: dc338f88cb43919c386205cbce38a5f248ff8afd31c0c339f3697e2e8ce4a72b
font_01_sfnt_off00007967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7967 10800 bytes
SHA-256: b2d9d57c6c499d88cb96c6167c08bcdd867a849a2152e6290f4aa04e9905cf28

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