Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfb4ec14adaace5f…

MALICIOUS

PDF

89.0 KB Created: 2021-03-05 04:15:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 514996bf0f42e7d3ccf9f10cd187e276 SHA-1: d7770861cd1b7d2dfa730e06d61f5dfb8cbb9c59 SHA-256: cfb4ec14adaace5ff329ebda7adc50409b66e9cf886da20d71174d3aee2efec8
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though heavily obfuscated, contains references to 'Lg 47ln5400 manual' and is associated with numerous URLs, one of which, 'https://xajibur.ru/strik?utm_term=lg+47ln5400+manual', is likely the primary lure. The presence of embedded URLs and the overall structure suggest this PDF is designed to redirect users to malicious content, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://xajibur.ru/strik?utm_term=lg+47ln5400+manual PDF link annotation
    • http://zoguponuwuxoli.medianewsonline.com/7535335446.pdfIn PDF document text
    • http://gutagige.sportsontheweb.net/87188248430.pdfIn PDF document text
    • http://terugate.mypressonline.com/el_guardian_entre_el_centeno_analisis_del_titulo.pdfIn PDF document text
    • http://miwewumexurigan.sportsontheweb.net/how_to_clean_krups_belgian_waffle_maker.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/vector_mechanics_for_engineers_statics_dynamics_9th_edition_solution_manual.pdfIn PDF document text
    • http://gixodugesu.medianewsonline.com/cuidados_de_enfermeria_pacientes_con_trombosis_venosa_profunda.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://zenejoku.rf.gd/grohe_kitchen_faucet_maintenance.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/religious_exemption_homeschool_letter_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dd11808-dcbf-4631-957c-deca752d5006/98380609530.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/met_police_report_non_urgent_crime.pdfIn PDF document text
    • https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_aee4588a8ca047159bb246aae1ae013f.pdf?index=trueIn PDF document text
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_49182a2ed70f4ef29385231398a2f920.pdf?index=trueIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_391a30acea1f46a6b155dd6012f738a8.pdf?index=trueIn PDF document text
    • http://fiderifi.rf.gd/what_is_intermediate_economics.pdfIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_b083d4979e8c4e7393ed8ae0cde636c4.pdf?index=trueIn PDF document text
    • http://kavibajegis.onlinewebshop.net/50260945984.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/salary_calculation_sheet_in_excel_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/66083268332.pdfIn PDF document text
    • http://rimuvuvipimube.epizy.com/online_admission_form_for_college_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70f987a9-c074-490c-9239-069210e8da04/star_trek_into_darkness_free.pdfIn PDF document text
    • http://zezofakarol.myartsonline.com/kojofimofijavosujudimo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a9c75da-ed68-4481-a1bb-168f9f21399b/what_is_created_when_chemical_reactions_join_atoms_together.pdfIn PDF document text
    • http://boxitevu.rf.gd/plus_one_business_studies_malayalam_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/graph_exponential_and_logarithmic_functions_worksheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10394 4632 bytes
SHA-256: 5709ce2e9d96406fd36feb13bd3f03e25775b45a88628ca0d61f560918c15369
font_01_sfnt_off0001133c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133C 16672 bytes
SHA-256: 395fdc40a1b698a0ddba99cfa8b4e54b7d5bdf0d14906c3d746f5e3740dffb09
font_02_sfnt_off000146c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146C8 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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