Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccfa4ad12d56ded8…

MALICIOUS

PDF

82.8 KB Created: 2021-04-07 22:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 366979414dca09bd83e6659863f11d48 SHA-1: 957d5d98cf18297760483a32777efe73665d98ee SHA-256: ccfa4ad12d56ded87cf9f54801c45e98f3da42b29932b22252c929b069c64c69
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body, though heavily obfuscated, contains references to 'Samsung tv volume not working', suggesting a lure for technical support scams. The presence of numerous external URIs, including 'https://fokemale.ru/strik?utm_term=samsung+tv+volume+not+working', strongly suggests the document is designed to redirect users to malicious websites for further exploitation.

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://fokemale.ru/strik?utm_term=samsung+tv+volume+not+working PDF link annotation
    • http://befigter.xyz/44972362754x709h.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/ibidha1/survivalcraft_apk_hile_indir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446272/normal_5fcbdb3ff1a80.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/eSS393M/65065220109.pdfIn PDF document text
    • https://cdn.sqhk.co/wopeporamo/vgggfO7/digikey_warehouse_locations.pdfIn PDF document text
    • https://cdn.sqhk.co/renosopezare/dks5kjf/wubamewenunasovomu.pdfIn PDF document text
    • http://indonesia2health.online/964125982241ghui.pdfIn PDF document text
    • http://lnstagramcopyrightmanagement.com/how_to_change_a_snowblower_augerdqrlo.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/hbjdhgd/fear_the_walking_dead_season_5_episodes_guide.pdfIn PDF document text
    • http://universe1.space/203346383242brlp.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/inductive_and_deductive_method_in_social_research.pdfIn PDF document text
    • http://liketime.online/tapawotapejuberubewaih06.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391335/normal_5fcc3f787de2e.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/lejivugeleguwod/car_damage_report_template.pdfIn PDF document text
    • http://kuxemozoxabonag.onlinewebshop.net/47023537630.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/takobofadugen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5694914-acf2-4f83-930e-eee979979bd9/66594955828.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0e0ed94-8e34-4fc6-b13a-15f8d533ffdc/resumen_por_capitulos_del_libro_la_casa_de_bernarda_alba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0719455-9b27-41b4-b2dc-cd563e19214a/91062836998.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/cfdi_3._3_requisitos.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/jojelalusikepanupukatowuk.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/46659431556.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_off00010403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10403 5324 bytes
SHA-256: 69e715ed913529207de77ebb119788165f7e27276061ec37c6e72bc3630c39e7
font_01_sfnt_off0001161a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161A 11392 bytes
SHA-256: d10dcfc3df8534265cd9b3343a8f69a72050cb8b5610e3e066ffb20ff5dbed1a

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