Malicious PDF — malware analysis report

Static analysis result for SHA-256 55ca67e762721558…

MALICIOUS

PDF

79.5 KB Created: 2021-03-06 00:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: bf5f0196110fa57ea7a4d5e1de838a64 SHA-1: afa15edfe0f64151ccbcddd7f2051a65d0df94c9 SHA-256: 55ca67e762721558d72316fc36a1c04f5e4a3d3fae227031ade904c2907c5a83
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the 'link farm' heuristic strongly suggest a phishing or malware distribution vector.

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://nipisod.ru/award?keyword=hp+laserjet+p2015dn+status+lights PDF link annotation
    • http://meetraisins.club/panasonic_plasma_tv_remote_priceevcb3.pdfIn PDF document text
    • https://sixokibikije.weebly.com/uploads/1/3/1/4/131437702/pudidujefeza-rowoji-numefuwelu.pdfIn PDF document text
    • http://itfamily.info/93523578695qy6iv.pdfIn PDF document text
    • http://zuvels.xyz/elsword_daybreaker_guidekdrgc.pdfIn PDF document text
    • http://sollabs.xyz/hamlet_freezer_moviewh5fn.pdfIn PDF document text
    • http://craftsmansmetics.com/747475571965x0yj.pdfIn PDF document text
    • https://nefabilaj.weebly.com/uploads/1/3/1/4/131438225/xozojonuxekonupidob.pdfIn PDF document text
    • http://namelesssouth.xyz/houseparty_logo_transparentw32l4.pdfIn PDF document text
    • http://theraisins.pro/biological_factors_psychology_definitionei9np.pdfIn PDF document text
    • https://nukowerijusez.weebly.com/uploads/1/3/4/3/134320067/fotuwupitop.pdfIn PDF document text
    • http://idealica-ufficialeitalia.website/jizubuwevomowedupo2335v.pdfIn PDF document text
    • http://dommasters.site/rain_bird_5000_plus_manuale_italianoc78su.pdfIn PDF document text
    • http://espaceabone.com/gb_whatsapp_7.35_version_apk_downloadcvhiu.pdfIn PDF document text
    • https://nujalujuxak.weebly.com/uploads/1/3/5/3/135347358/vusapitalut.pdfIn PDF document text
    • http://gladkoe-telo.xyz/nusosikigifabekug8ul8e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5cfdae38-3074-476c-a131-b3fa2f71d764/tulevepenutanuxibeluwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2671b126-321a-4990-83ad-0c552f6badb5/5541140300.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/guwuzufasili.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/kendo_ui_grid_column_template_conditional.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2eaa7a7-3179-46e4-9ba8-0220f3e513fc/what_are_language_features_of_academic_writing.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAE 5480 bytes
SHA-256: ac6e83f8de565ee352193809265be6d5d744ff15030210dfad7e233ebfa6eddb
font_01_sfnt_off0000fe3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3C 10548 bytes
SHA-256: 37e505205b99f098a8d794db56a0535ba481fc4ddf4fa8ca9c80f06eec537de1
font_02_sfnt_off00012267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12267 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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