Malicious PDF — malware analysis report

Static analysis result for SHA-256 178f58f95cbffb0e…

MALICIOUS

PDF

41.2 KB Created: 2020-11-05 08:06:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 85827915a236ac15cea3776c41fd99cc SHA-1: dc302b8298a850e841636b78bad5aae5b846c485 SHA-256: 178f58f95cbffb0ecb357a751fd2ac5734887525b25f77fa29cb9eeeaed406f5
94 Risk Score

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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/123?keyword=definition+of+methylene+blue In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368782/normal_5f9253dc8bead.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388617/normal_5f9129e1722f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393514/normal_5f993e88cc01c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5f88b7876305a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375210/normal_5f9bb239e8ae9.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/bededuxotulapil/diffrence_entre_cellule_animale_et_vgtale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaa0a9b9-d2cd-4490-9178-c984db328089/managerial_accounting_garrison.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/how_old_is_nba_youngboy_son.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/balanis_antenna_theory_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/83905034097.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/franklin_head_start_franklin.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/greenhouse_effect_gizmo_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d298d803-05d2-464a-9726-f1e276834e70/private_school_mod_sims_4.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_off0000642c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642C 4764 bytes
SHA-256: dfb64ef4fb0b266213d72b3b861903ae0542858e952968c30ae0e4462f13d181
font_01_sfnt_off0000744d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x744D 10664 bytes
SHA-256: 239e34d4f80179e1703622a926b531145800ea067f4fe4166ed7595f34477c99