Malicious PDF — malware analysis report

Static analysis result for SHA-256 51e5257ba0f931a7…

MALICIOUS

PDF

82.3 KB Created: 2021-03-01 00:49:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d684bd7499d9352f90dd615f1cd8a639 SHA-1: eb9a92a2aea0821ef26baf1f8a6f26757c4aafdb SHA-256: 51e5257ba0f931a7030ec9a72d759c024f13e29513f2691725bb33821f7c56e9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/strik?utm_term=what+is+african+literary+criticism PDF link annotation
    • http://fupefabesosada.mygamesonline.org/39666718496.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367964/normal_6028f8b4349fd.pdfIn PDF document text
    • https://cdn.sqhk.co/nulusezitelo/L89giie/teachers_credit_union_california.pdfIn PDF document text
    • https://cdn.sqhk.co/wizokawoxo/hgjdYhj/19146414414.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408190/normal_5ff9605fc7f5f.pdfIn PDF document text
    • https://cdn.sqhk.co/nejisakatok/gfOjaSZ/hidden_objects_rustic_mystery_games.pdfIn PDF document text
    • https://cdn.sqhk.co/zolulesar/cRjjagg/dibijenowar.pdfIn PDF document text
    • https://cdn.sqhk.co/gukitane/idV6vhd/zukifixufesudivijodovip.pdfIn PDF document text
    • http://pedumerik.sportsontheweb.net/how_to_empty_dyson_dc59.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/jgvokhd/22213121826.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500200/normal_603bc9062051f.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/hhehhii/catfishing_tips_for_rivers.pdfIn PDF document text
    • https://cdn.sqhk.co/vatuliwa/rihTggd/muvuvumusutewejej.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/what_is_the_best_griddle_for_a_glass_stove_top.pdfIn PDF document text
    • http://xofebuledat.scienceontheweb.net/unity_game_engine_for_android_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/jggdWxC/field_goal_kicking_drills.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/bLQkpjc/advertising_manager_easy_definition.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/minegikukovel/third_grade_spelling_words_free_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/68631420363.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/paypal_app_android_tablet.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/35835253510.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001060e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060E 5236 bytes
SHA-256: 6c81d6f382875c3aed123327d3d700826a50ad0ce52cf4d98767bb0117c752c2
font_01_sfnt_off000117c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C8 10404 bytes
SHA-256: 24017ecc3917551f3e1a5e1d976d3ded4edaa03b24af7501dd80f14183f7142f

Open this report in the interactive analyzer, or submit your own file for analysis.