Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c9a435fe8eb1147…

MALICIOUS

PDF

78.1 KB Created: 2021-05-07 03:55:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a103280234984f840b5f231cce874f9f SHA-1: b266a6a12e9c12532b6bd65e919e930b0d77430f SHA-256: 4c9a435fe8eb1147ca1ddb097ef633f6b79ff8948afc694b3768f479c6a85d87
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 and link farms, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to exploit kits or malware downloads. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to trick users into visiting compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://fokemale.ru/strik?utm_term=how+to+fix+ice+maker+whirlpool+side+by+side PDF link annotation
    • https://tagakokiginozol.weebly.com/uploads/1/3/0/7/130775172/pobipakiminuj.pdfIn PDF document text
    • https://pexulowiseguwuz.weebly.com/uploads/1/3/4/3/134391342/8243062f0183a.pdfIn PDF document text
    • https://milikosepawina.weebly.com/uploads/1/3/2/6/132696406/2879ddb09ccc6.pdfIn PDF document text
    • http://nenonazuf.scienceontheweb.net/subway_surfers_para_hilesi_oyun_indir_club.pdfIn PDF document text
    • http://texoraw.sportsontheweb.net/how_to_mix_music_together_on_itunes.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/dobiwefase.pdfIn PDF document text
    • https://litazotivov.weebly.com/uploads/1/3/0/7/130740097/loniso_lezazejenet.pdfIn PDF document text
    • http://malolufixanovas.sportsontheweb.net/catholic_english_prayer.pdfIn PDF document text
    • https://pedodexojur.weebly.com/uploads/1/3/0/7/130775447/xaxiwaran-somiwegekove-debewo-rupamunaliwab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410954/normal_605d089151e0d.pdfIn PDF document text
    • https://nawawuxilebop.weebly.com/uploads/1/3/4/6/134679594/9997278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473892/normal_601a00652333f.pdfIn PDF document text
    • https://zedazepofa.weebly.com/uploads/1/3/0/9/130969939/3625794.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/3251996102.pdfIn PDF document text
    • http://nuweselomarovir.22web.org/8316978522.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471082/normal_5fd80f259c6ed.pdfIn PDF document text
    • https://toxujubew.weebly.com/uploads/1/3/1/4/131437446/7056b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490930/normal_6035e801f0d17.pdfIn PDF document text
    • http://goligofalu.medianewsonline.com/laboratory_safety_rules.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vimixof.onlinewebshop.net/55236494536.pdfIn PDF document text
    • http://jofijegisa.atwebpages.com/bakodefanijutanirexib.pdfIn PDF document text
    • http://jifimurosesapu.atwebpages.com/kobowumewufafapazemu.pdfIn PDF document text
    • http://wosolebaxuwutux.rf.gd/who_is_the_strongest_godzilla_monster.pdfIn PDF document text
    • http://bekawaxag.rf.gd/anseriformes_lower_classifications.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_off0000f0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A8 5820 bytes
SHA-256: 3a39fa8384d729b28c0a0e1d577be183d55e5e087505a835b89a2e95c7fb67a6
font_01_sfnt_off00010461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10461 11420 bytes
SHA-256: 1030fbbd1a221bb1cef8fc1b09b69ae146234d5cc3fdfbfd22d27c5d60a276c8

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