Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d32dea70a3c4e72…

MALICIOUS

PDF

68.0 KB Created: 2021-02-23 02:40:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 1932fa41bb058e7d979a24309fbf7b02 SHA-1: be2232f066dc73970bea5381ceb85b03fccbe0f4 SHA-256: 6d32dea70a3c4e72e1330ae83224a7682d39c7a6b58a20ecf25663a94a2459b8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and the link farm heuristic suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=how+to+connect+logitech+mk320 PDF link annotation
    • http://meetsalon.xyz/books_in_order_dan_brown8vb4m.pdfIn PDF document text
    • http://topmassage.net/pololu_a4988_datasheetqyu8e.pdfIn PDF document text
    • http://lnstagramcopyrighthelps.com/free_download_gba_rom_pokemon_light_platinumbxdg5.pdfIn PDF document text
    • https://zulitaxovali.weebly.com/uploads/1/3/5/3/135351491/4707718.pdfIn PDF document text
    • http://kraftmann.su/tippmann_a5_upgrade_barrelpn3ry.pdfIn PDF document text
    • http://igcopyrightforhelps.com/651995188410c9na.pdfIn PDF document text
    • https://satizivuzaked.weebly.com/uploads/1/3/4/3/134383512/wunimokig.pdfIn PDF document text
    • https://bololadagulit.weebly.com/uploads/1/3/5/3/135348095/1711423.pdfIn PDF document text
    • http://allostar.buzz/vovufh8c2n.pdfIn PDF document text
    • https://gavititexufo.weebly.com/uploads/1/3/3/9/133997787/3817217.pdfIn PDF document text
    • http://gonzo-3d.com/chicco_cortina_stroller_replacement_canopy1jrq1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://botusijafen.rf.gd/51745457593.pdfIn PDF document text
    • http://nekaxikafixof.epizy.com/vojireradozivarapokimaxen.pdfIn PDF document text
    • http://mirepili.epizy.com/merge_jpg_docs_to.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/ditukujazi.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/3331106361.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/filmywap_punjabi_movies_2019_shada.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_off0000cab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB8 5284 bytes
SHA-256: 56e8222a73f6ffc17d049ee24e838cb9a3af7c84402d23949cf4b33660d0ac95
font_01_sfnt_off0000dca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA8 11504 bytes
SHA-256: 883ecf18c86685ad5a5ebae646aee16bc9edbbc6d7264549afda9941921b1b6b

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