Malicious PDF — malware analysis report

Static analysis result for SHA-256 01142ed69d0586bc…

MALICIOUS

PDF

79.2 KB Created: 2021-03-03 22:38:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 04583a4a735e5d90130ecec12a521afd SHA-1: 65ccccaf8d2b683853498fea018608e00a80e265 SHA-256: 01142ed69d0586bcb40f7ab6c4d4b4c47469eb6b0d6fe3bfd0da2d80619ababa
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The document body, though heavily obfuscated, suggests a lure related to a 'Castlevania 3 manual' to entice users to click on the embedded malicious links.

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
  • 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://seumenha.ru/wix?keyword=castlevania+3+manual PDF link annotation
    • https://viluxesoxumubi.weebly.com/uploads/1/3/1/4/131406714/b14baa2.pdfIn PDF document text
    • http://bonifacy.site/superficial_basal_cell_carcinoma_treatment_guidelines5qxw8.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/gevepezexi.pdfIn PDF document text
    • http://thefortykuti.com/quick_sand_hell3tu4p.pdfIn PDF document text
    • http://file-id.ru/canon_600ex_rt_ii_battery_packnx8oo.pdfIn PDF document text
    • http://mexicotop.xyz/lg_tromm_washing_machine_error_code_oe1dyeh.pdfIn PDF document text
    • http://organize.shop/87046975612g293m.pdfIn PDF document text
    • http://thecabinets.xyz/business_information_technology_courses_in_canadayvqcz.pdfIn PDF document text
    • http://instapodarok.site/wixumidunapegb34k.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/vans_old_skool_platform_white_australia.pdfIn PDF document text
    • http://asia.kiwi/sony_wega_trinitron_21_inch_tv_pricepa4xb.pdfIn PDF document text
    • http://voyazh-shina.com/nutimumafawovikil6434x.pdfIn PDF document text
    • http://scotiaenlineape-personas.com/jelexatamixumitodktaaq.pdfIn PDF document text
    • http://podarokinsta24.online/b._ed_degree_form_aioucbtb7.pdfIn PDF document text
    • http://obsluzhivanie-kompyuterov.moscow/cisco_dpc3941t_wifi_speedpxgt2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pefemopu.epizy.com/85733348100.pdfIn PDF document text
    • http://sorisavitekinuj.onlinewebshop.net/navy_seal_training_hell_week_video.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_off0000fc81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC81 4864 bytes
SHA-256: 7559e225644f841ed8e82c88ec2f463b5fd001c3096608219a95d4f0a04c27cc
font_01_sfnt_off00010cfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFB 10184 bytes
SHA-256: 67693a810796a3aef898eb8e7c32a457cd2b303b37fbb0fdc8452e8e59fd84e1

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