Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca705a24d78806c…

MALICIOUS

PDF

81.2 KB Created: 2021-02-06 17:39:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 50677a8589d32f3d8b0564743648562f SHA-1: 8cc8eb51133d7cebf412b9add57b7d52acf5d31c SHA-256: eca705a24d78806c9829e68ec528b46505c4ae86f980201adaf6728b0c1dd886
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/shook?utm_term=samsung+split+system+air+conditioners In PDF document text
    • http://relax35.ru/pezufejokordb5.pdfIn PDF document text
    • http://dreabling.online/95599755262cs4bw.pdfIn PDF document text
    • http://btsworld.org/rebepiwojurediwugirosd6z8.pdfIn PDF document text
    • https://cdn.sqhk.co/berovanova/dCXiige/14133240542.pdfIn PDF document text
    • http://yourdesk.website/o_ramasamy_nadar_singaporemiuam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408582/normal_6012515fa5a2b.pdfIn PDF document text
    • http://the-english-temple.com/samipubipexinyv.pdfIn PDF document text
    • http://ver-alex.website/weather_forecast_new_york_statej1f4y.pdfIn PDF document text
    • https://cdn.sqhk.co/kakezesarop/je5oxja/87504387668.pdfIn PDF document text
    • http://autoupgrade.website/movie_catalog_app_windowsa1005.pdfIn PDF document text
    • http://stassikorskyi.com/856791757891diyk.pdfIn PDF document text
    • http://usesalle.xyz/wixebuzajitopisuzezaxudipq1t0y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386094/normal_5ffb9389bfddc.pdfIn PDF document text
    • http://lasns.fun/fulatukovamerefodelu4g80.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/vanatul/2019_movies_songs_bollywood.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/applied_physics_engineering_1st_year.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/vajerojumafepibiborus.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/62403005488.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_off0000ffad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAD 5600 bytes
SHA-256: bb136c56047ce51e1e3f4f1b2152b781289c37ac8d9a85e404696d3eae725f3b
font_01_sfnt_off000112a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A8 11036 bytes
SHA-256: 1af2ae7827cd5a964d9f0b79e9b6d5d43ae2aac5b7a254b4df19e390533deebc