Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1c9f26f77dc424…

MALICIOUS

PDF

42.6 KB Created: 2020-11-08 00:58:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 5f15b4a89b23d0bcd1e29612e1495ebd SHA-1: 534baa355ffab6e68d0b5f4794a587bc12300b1d SHA-256: 0a1c9f26f77dc4240e424938c5cf8f91d5328511909424ee17c4f8ee2834fd25
96 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 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 https://traffking.ru/123?keyword=jersey+shore+season+4+music PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471484/normal_5fa696b06e74b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417129/normal_5f9e8902e29ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f8d127ac24a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413455/normal_5f95af5362c1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f8f13a1d5e3a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://gunagabifaxu.files.wordpress.com/2020/11/microbios_y_enfermedades_ruy_perez_tamayo.pdfIn PDF document text
    • https://vipuvixo.files.wordpress.com/2020/11/92295293341.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/60886789136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3acb16db-6dba-4578-8e2c-fc843d54f7e8/lapojabesukipapamopagog.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/60448902288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fb3400d-1f1b-4a3c-86e8-5213c8bee367/55401726705.pdfIn PDF document text
    • https://redasiwum.files.wordpress.com/2020/11/full_wave_rectifier_op_amp_circuit.pdfIn PDF document text
    • https://panezij.files.wordpress.com/2020/11/kenaxo.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_off0000665f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x665F 5188 bytes
SHA-256: 8401cdf70355094ab4d9a060c4f730ed55f61d0f9faf71ad80c8d6f31c078a3c
font_01_sfnt_off000077e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77E5 10976 bytes
SHA-256: 2abe3b12dad427d3d9ff4b0052d10ee62a98e95183725ecc0d75d24c97c6f411

Open this report in the interactive analyzer, or submit your own file for analysis.