Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9ddf1aa640f884…

MALICIOUS

PDF

37.8 KB Created: 2020-11-06 21:47:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0fbea69ddcc281e2516c6245c443236b SHA-1: 53a1f1dd87356bb0cc7f41fd6a3a9f5efb5d46f1 SHA-256: 2c9ddf1aa640f884b43429d7e28ec7f29fbdb5ef15c67aaef186fe859346b145
124 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and contains multiple embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL. This suggests the PDF is designed to lure users to malicious infrastructure, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.
  • 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=musica+peruana+mix+delites+andinos In PDF document text
    • https://julitigifoxa.weebly.com/uploads/1/3/4/3/134310533/4500275.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5f923a795bc16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_5f8a6da1f156e.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/mesixadelomomo/star_fleet_technical_manual_torrent_download.pdfIn PDF document text
    • https://tijupojis.files.wordpress.com/2020/11/dobaf.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/dare_to_be_a_daniel_lyrics.pdfIn PDF document text
    • https://nizowowe.files.wordpress.com/2020/11/midesifitir.pdfIn PDF document text
    • https://dutekosakiwe.files.wordpress.com/2020/11/licenciado_cortillo_familia_peluche.pdfIn PDF document text
    • https://goresab.files.wordpress.com/2020/11/kaxafopuzikewovenikem.pdfIn PDF document text
    • https://dogugomuvup.files.wordpress.com/2020/11/82308150569.pdfIn PDF document text
    • https://saridejawe.files.wordpress.com/2020/11/63474122853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3338cb24-41fa-4c56-b946-2d94b07bc301/week_8_secret_battle_star_location.pdfIn PDF document text
    • https://dagifijuba.files.wordpress.com/2020/11/fonebovamida.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/sims_4_gradual_aging_mod.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_off0000543e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x543E 5292 bytes
SHA-256: 72ec3c475f8c2a312cfe8dc23946ffec6359ba3c5be6db9787350ba75fa9b152
font_01_sfnt_off00006636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6636 10636 bytes
SHA-256: dee0ed75e0b27b30025d128459c5c1088646d7a435c32814270bb9f78b660952

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