Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7b4187afa5bb602…

MALICIOUS

PDF

77.1 KB Created: 2021-04-27 22:34:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1816d5cfe1588e804dd9ebbf3d675448 SHA-1: eca4374f5076a4c874e74db84c2b4fb0b5a6a30b SHA-256: e7b4187afa5bb6025ee94d98acaba3accb0802a710b5e8b3e140cc398b3d034e
126 Risk Score

Malware Insights

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

The PDF file contains a lure related to setting up Xfinity equipment, which is a common tactic for phishing or malware delivery. It embeds a suspicious URL, 'https://baarspo.ru/strik?utm_term=how+to+setup+xfinity+x1+box', which is flagged as external and part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via the embedded link.

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://baarspo.ru/strik?utm_term=how+to+setup+xfinity+x1+box PDF link annotation
    • http://volewug.iblogger.org/zoho_c_aptitude_questions_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420930/normal_60224e607163a.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/l0idgdk/offline_maps_and_navigation_premium_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379487/normal_60063eceadf42.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/zlEbXha/world_war_rts_games_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470029/normal_606a593d07c27.pdfIn PDF document text
    • http://depozamojazuj.22web.org/australia_immigration_form_1229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479470/normal_605951d914dc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470553/normal_603c271bb060d.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/mejifavo/filizezapizadobe.pdfIn PDF document text
    • https://d0bf7e8b-5449-41c0-93e9-161603c0719f.filesusr.com/ugd/197ed4_012feacacc274d82ae2ec1c4f01ee4de.pdf?index=trueIn PDF document text
    • https://2d841ef3-a248-4e6a-996b-2d54d6713fdd.filesusr.com/ugd/1decf9_1c82590b9d034429a226c73d15f4524f.pdf?index=trueIn PDF document text
    • http://zojimako.rf.gd/nc_drivers_license_cost.pdfIn PDF document text
    • http://bedipate.epizy.com/41027049416.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/when_you_wish_upon_a_star_sheet_music_violin.pdfIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_cf90324c24224d38b531e98a752ac578.pdf?index=trueIn PDF document text
    • https://d6504552-49b0-4b7d-b1ff-94f9e1082b83.filesusr.com/ugd/1f0558_a538675c7d614f9db52b90893cac5ac2.pdf?index=trueIn PDF document text
    • http://marabawem.rf.gd/zero_movie_hd_movies_counter.pdfIn PDF document text
    • https://32cf4326-ba62-484c-a3ca-05d02c2dd2e5.filesusr.com/ugd/0b46e6_a7ccaab813364ec4addd588517c49909.pdf?index=trueIn 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_off0000eec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC2 4972 bytes
SHA-256: 66cb84a0d83e910d18c4144afeced41c0453ab02f9bfb0f11bbbd7cbbc7fc123
font_01_sfnt_off0000ffe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE8 11660 bytes
SHA-256: 33dd71f9fea84637a643b420fd4637b2e83058cb6a7ebb1b6c0aa44e41e17a00

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