Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ea72846dd5ddf2…

MALICIOUS

PDF

35.3 KB Created: 2020-06-03 14:41:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-10
MD5: c7b9650184898632bd1acfd62278dd8e SHA-1: 8edecb7a663a55f3f485b86e88d29b91533c2a2d SHA-256: 03ea72846dd5ddf2cd66e60015297b2f7684274b154df53e35cf96c70727fa18
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a mass external link farm. While no scripts were explicitly extracted, the nature of the embedded links suggests a potential for further malicious activity, such as downloading secondary payloads or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://hostmaster.greensteps.wales/uploads/1/3/1/4/131454093/131454093.html#naruto+shippuden+ultimate+impact+cheats+ppsspp PDF link annotation
    • http://phonecases-n-cords.com/uploads/1/3/1/6/131606365/wimapotexu.pdfIn PDF document text
    • http://mail.vailvalleybaptistchurch.org/uploads/1/3/0/8/130814421/8449136.pdfIn PDF document text
    • http://drjkrohnconsultant.com/uploads/1/3/0/2/130291433/nexomudesafegig.pdfIn PDF document text
    • http://cpcontacts.culturebeaumont.org/uploads/1/3/0/6/130639558/rorebojadubugef_jofufam.pdfIn PDF document text
    • http://thehomeplacefamilyrestaurant.com/uploads/1/3/0/6/130639348/4108396.pdfIn PDF document text
    • http://mail.ivsaluki.com/uploads/1/3/0/9/130969426/lididuzejulo_dijoneninalo_lakiwa_nofig.pdfIn PDF document text
    • http://mail.cocoabeachalehouse.com/uploads/1/3/0/7/130776754/51f716a1.pdfIn PDF document text
    • http://ladyrealbasketball.com/uploads/1/3/0/9/130969878/sapar.pdfIn PDF document text
    • http://ecorossconsultants.org/uploads/1/3/0/3/130313286/gelogukejivosabobi.pdfIn PDF document text
    • http://mta-sts.mx.a1windshield-vinylrepair.com/uploads/1/3/0/7/130776015/5360444.pdfIn PDF document text
    • http://hostmaster.greensteps.wales/uploads/1/3/1/4/131454093/terms.htmlIn PDF document text
    • http://hostmaster.greensteps.wales/uploads/1/3/1/4/131454093/dmca.htmlIn PDF document text
    • http://hostmaster.greensteps.wales/uploads/1/3/1/4/131454093/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zeruzotel.files.wordpress.com/2020/05/kibivitisudil.pdfIn PDF document text
    • https://doraxurewaz.files.wordpress.com/2020/05/21296662367.pdfIn PDF document text
    • https://jobulujegobi569576739.files.wordpress.com/2020/06/63290114802.pdfIn PDF document text
    • https://nososakuzeku.files.wordpress.com/2020/06/80626740578.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5C 10080 bytes
SHA-256: 7b14af5489e7cde8a2971d1f788653cc305a3c90221b6e36c80bacc487a55745

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