Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb5248df661e097a…

MALICIOUS

PDF

75.2 KB Created: 2021-02-28 17:13:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 1f996f7426ac3bde3708d4f471130065 SHA-1: 52b6de3a1e0923d773625e3e9524535f1d4585cf SHA-256: eb5248df661e097a7e72593f8e63a319155dd4d051dc4b8ef8d1b13dc780f4ad
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including one pointing to 'bologen.ru', suggests the document is designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a tactic to obscure the true destination or distribute malware through a network of disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/strik?utm_term=misal+romano+tercera+edicion+usa+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384037/normal_5fd1bd8a067b2.pdfIn PDF document text
    • http://bristol-yalta.run/mod_organizer_no_handler_foundnkhck.pdfIn PDF document text
    • https://cdn.sqhk.co/rosojolude/5mmkDVt/32236558091.pdfIn PDF document text
    • https://cdn.sqhk.co/sezelijimofi/SZjb5id/imo_free_hd_video_call_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394077/normal_602c15eee4035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_602f406516efb.pdfIn PDF document text
    • http://leoidet.xyz/what_is_five_out_in_basketballeswoa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427809/normal_5fcacd6d81dee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409254/normal_5fcbd44c1ce12.pdfIn PDF document text
    • http://prizinsta.site/6782277790884qco.pdfIn PDF document text
    • https://cdn.sqhk.co/vizebika/1EmE16t/alexa_rank_checker_api.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374851/normal_5fdf337ae1073.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460233/normal_5fcf475fc52ea.pdfIn PDF document text
    • http://andyhongdigital.com/2013_subaru_impreza_hatchback_oil_typee5hdz.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/three_billy_goats_gruff_story_pictures.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462096/normal_6011b93d773a4.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/rutufokedizon/2019_tamil_movies_isaimini._com.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/cognitive_behavioral_therapy_techniques_for_anxiety_and_depression.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/zemola.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/23196135597.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_off0000e71a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71A 5304 bytes
SHA-256: 10c24438145280798bf87ab786215dcf20228497a1764ad254ca0af4b6ec9e30
font_01_sfnt_off0000f916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF916 11332 bytes
SHA-256: e3a0bde51324968743b80d3d5a20552fd6ffb384ea2732e64803935663f87a13

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