Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9f8a80475a58d9d…

MALICIOUS

PDF

89.3 KB Created: 2021-03-21 05:59:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 166c9dc8941851d4aa7f65c2bc495d8a SHA-1: b06b504086a624b68bfcc30e59aa2248f713dd6f SHA-256: e9f8a80475a58d9d59b84c699621bd805fb3c76e0514e02a89209615a6bcfd9c
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 of which are hosted on disposable domains or link farms, indicating a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=teaching+methods+for+adults+pdf PDF link annotation
    • http://fitdieta.com/kogiloxomajokagesiniwuretuycd7.pdfIn PDF document text
    • https://cdn.sqhk.co/moranunemuk/hchdjqW/police_report_example_year_6.pdfIn PDF document text
    • http://tehnopolis.org/amplificador_line_6_spider_iv_150w3j29x.pdfIn PDF document text
    • http://eglo.club/cen_tech_scanner0su0k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403533/normal_5fdcf9c867bf9.pdfIn PDF document text
    • http://steh-sistem.ru/35806763096o4dea.pdfIn PDF document text
    • https://vodefuba.weebly.com/uploads/1/3/4/6/134688083/pekufavusivozuviz.pdfIn PDF document text
    • https://cdn.sqhk.co/xitilesuxiw/bRjhBhj/rorefufivesuzun.pdfIn PDF document text
    • http://zasazigupat.getenjoyment.net/12037348621.pdfIn PDF document text
    • https://kuvixirizu.weebly.com/uploads/1/3/0/7/130739951/9414669.pdfIn PDF document text
    • http://vutajazelige.medianewsonline.com/adverbs_of_manner_lesson_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/sekopanosesu/cdhawhd/femuvegope.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/uhheKhe/cast_of_the_movie_loopers.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/how_to_pair_a_blueant_bluetooth.pdfIn PDF document text
    • http://tuduvodakep.mypressonline.com/linksys_wrt160n_v3_change_password.pdfIn PDF document text
    • https://rinadulig.weebly.com/uploads/1/3/0/7/130739308/86aadf34f9.pdfIn PDF document text
    • https://padilokemim.weebly.com/uploads/1/3/1/3/131381900/junutikuluw.pdfIn PDF document text
    • http://bimovixexena.scienceontheweb.net/57658167607.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449402/normal_603597c264a7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481275/normal_5fd7994ceac11.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
    • 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 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF8 5400 bytes
SHA-256: c33ad533e326343cf8004a6a0c64d90aa330fabf0b0e1132cc01a4f5cb918239
font_01_sfnt_off00012123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12123 11388 bytes
SHA-256: a159b8990572be7bc0a8e236b7f01a2b2e6c88a04b867b3edd5f8ae730564ba8
font_02_sfnt_off00014817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14817 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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