Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf0dfee9c001882…

MALICIOUS

PDF

86.1 KB Created: 2021-05-18 11:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 18c016292a662b53a8c6b9aba0ca4d51 SHA-1: 2136cb82237b509fe9b14298a5336319ef7e5baa SHA-256: bcf0dfee9c0018821d68b4ab3697a4af96791b81a1b2ba8457c3deaadcdda718
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The document body text, though partially garbled, mentions 'Descargar geometry dash 2.111 para android', suggesting a lure to trick users into downloading a file. The presence of external URIs and the ML classifier's high confidence score further support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://nipisod.ru/strik?utm_term=descargar+geometry+dash+2.111+para+android PDF link annotation
    • https://zojopufowe.weebly.com/uploads/1/3/4/5/134523349/605d1eea7b0a.pdfIn PDF document text
    • http://pubaninuw.22web.org/59872952749.pdfIn PDF document text
    • https://lamixanusagexog.weebly.com/uploads/1/3/5/3/135317293/55539.pdfIn PDF document text
    • http://mosilosa.iblogger.org/moxafa.pdfIn PDF document text
    • http://zoxifowivo.iblogger.org/oscillator_circuit_design.pdfIn PDF document text
    • https://nubipudovolena.weebly.com/uploads/1/3/4/0/134012318/sakifidefag.pdfIn PDF document text
    • http://wojidibotetim.22web.org/catechism_of_the_catholic_church_2nd_edition.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://ruzudamunedawok.epizy.com/5_paragraph_operations_order_template.pdfIn PDF document text
    • http://miviguwi.epizy.com/72754677400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5fcab6a-a970-458f-a4b9-399c64f5171f/26254865060.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fd8a266-9db5-4454-97af-fca3cbf50390/med_surg_certification_study_book.pdfIn PDF document text
    • http://bopamebedozupux.epizy.com/human_brain_anatomy.pdfIn PDF document text
    • http://labopum.rf.gd/amritsar_shatabdi_on_which_platform.pdfIn PDF document text
    • http://jixadatisaxifid.rf.gd/qualities_of_good_writing_in_journalism.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/dixixisuxaxawepepibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efa5b3a5-1956-4629-ac82-16f2f46afed1/54787679255.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/oxidation_of_alcohols_to_form_carboxylic_acids.pdfIn PDF document text
    • http://baxodivol.rf.gd/chevrolet_captiva_2008_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f73b9ec0-2892-42f8-868c-7b691933f105/94897921891.pdfIn PDF document text
    • http://bunopudo.rf.gd/biochemistry_of_alcoholic_fermentation.pdfIn PDF document text
    • http://webuvur.epizy.com/belajar_membaca_anak.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF677 2880 bytes
SHA-256: b90b109c34db9b2d961be312c0c64f13ba4f5af9c83d6ae4556a72cb7f468167
font_01_sfnt_off000100b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B5 5560 bytes
SHA-256: f7358fb408acc225858cfecdb7672c0980bd6186764e558dbd96db2b2c1c4b2f
font_02_sfnt_off0001138c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138C 11892 bytes
SHA-256: 457723ccbb6ecc2dccf9ccfd25916b69d89f8093b6d6edc0b3846b0e925e1e78
font_03_sfnt_off00013a79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A79 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.