Malicious PDF — malware analysis report

Static analysis result for SHA-256 18051c409a7fadc7…

MALICIOUS

PDF

78.4 KB Created: 2021-03-16 17:56:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: fde1fed48e25a18cc70b1d065f2a057a SHA-1: d138e5f1a9cce66ae61f9975c2d9f011dca45244 SHA-256: 18051c409a7fadc7e73d5107dec938c346674d0182b8c6821e9c8d1ed725b202
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of external URIs and the overall structure point towards a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/strik?utm_term=chicago+manual+of+style+comma+before+quotation PDF link annotation
    • http://toxipoxekej.medianewsonline.com/62541603811.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/WgzjjaH/zokufelefatet.pdfIn PDF document text
    • https://cdn.sqhk.co/kefaforuletu/ZDijpjc/descargar_antivirus_gratis_para_tablet_android.pdfIn PDF document text
    • http://kidufamipowanot.mywebcommunity.org/jenokupelulibaran.pdfIn PDF document text
    • https://cdn.sqhk.co/pakelabete/wigWghU/72720414939.pdfIn PDF document text
    • http://tunizunifegitof.66ghz.com/7251372105.pdfIn PDF document text
    • http://jonebukusopovet.mygamesonline.org/what_the_bible_says_about_your_comfort.pdfIn PDF document text
    • http://fatadakar.iblogger.org/bams_full_syllabus.pdfIn PDF document text
    • https://cdn.sqhk.co/gusoguribus/jihaggK/road_glide_incredible_flying_games_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/tupipitijil/hbPhcLy/rexall_london_ontario.pdfIn PDF document text
    • https://cdn.sqhk.co/lizuxutagisu/upIjhic/official_football_referee_gear.pdfIn PDF document text
    • http://monufovaxuj.66ghz.com/chisholm_v_georgia.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/rejiner/battleground_survival_offline_apk.pdfIn PDF document text
    • http://pidodexogejax.myartsonline.com/sudex.pdfIn PDF document text
    • http://kozogasivufi.myartsonline.com/66617560594.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/66415657493.pdfIn PDF document text
    • http://rarefovukafulu.rf.gd/67511357228.pdfIn PDF document text
    • http://pexaniruvuwuwe.rf.gd/hingham_journal_police_report.pdfIn PDF document text
    • http://govatojajij.epizy.com/b_d_full_form_medical.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/hortonworks_nifi_templates.pdfIn PDF document text
    • http://kisezemewarajox.rf.gd/absolver_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/deus_ex_human_revolution_boss_fights_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/simple_html_templates_free_without_bootstrap.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 8

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_off0000f243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF243 5568 bytes
SHA-256: a1b0ceafa8f1bc3a81e7bc9b3eeb0b5f7ba72d2a499049834a3160adbab206e4
font_01_sfnt_off00010511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10511 11424 bytes
SHA-256: 2187ee320367cdbe2eb2057fef4087b1a2634d9328d47d01d82b5fa721689fcc

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