Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad7696c586bf42fb…

MALICIOUS

PDF

58.8 KB Created: 2020-11-06 00:49:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4698c83722ca086a0a889d304dbebaa0 SHA-1: 3c4022f72031d25b53887cf7089cd4851cecd19c SHA-256: ad7696c586bf42fb0a9925e79a04cc048523bd26db2a07c1f903360e3be57923
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, many pointing to disposable hosting services, and one specifically linked to a search query for game codes. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external links suggests a link farm or traffic redirection scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious intent to redirect users to potentially harmful websites.

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://traffset.ru/strik?keyword=bee+swarm+simulator+codes+2020+june+list PDF link annotation
    • https://lijipowurop.weebly.com/uploads/1/3/4/3/134314174/vuzugotalidego.pdfIn PDF document text
    • https://gepobuxew.weebly.com/uploads/1/3/1/0/131070920/7e51ca03d5a6976.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/lazukefitivupole.pdfIn PDF document text
    • https://lafozevu.weebly.com/uploads/1/3/4/3/134378288/jovanagonita_dediza_fovuxig.pdfIn PDF document text
    • https://pivozedotafi.weebly.com/uploads/1/3/1/0/131070355/1257824.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/vutor-wiruwapigo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5d0cd511-7fe9-4ff5-a143-e9cc56e1feda/xegusep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f76db75-b7ed-480a-b9b7-84c4016080a4/79555220926.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/54475021090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ec8bbea-f5a9-4a0c-a202-2c36b57db12b/zinadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8771b318-3317-4b50-8a3f-36d7ddd8cfcc/96520144259.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eafe15d-159c-4625-8f5c-ca02838207d3/nobivak.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_off00009638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9638 5460 bytes
SHA-256: 7f2bad3f0559f3ff6e4d8c859a38783b13c3ed7cc278423abfc00c57b2e99195
font_01_sfnt_off0000a8ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8BA 11744 bytes
SHA-256: 2f514816118099d99c33e12519351fbe6ee3d2bb3eedc82750752e821fc320c3
font_02_sfnt_off0000cfcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCC 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34