Malicious PDF — malware analysis report

Static analysis result for SHA-256 f69bed24239ec4eb…

MALICIOUS

PDF

73.4 KB Created: 2021-05-31 20:00:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d76dc6f4b2ec07ef6fe2f1079b61bfd0 SHA-1: 9ee87a6d4d2a82cd54a367d207bd293ca81d43ea SHA-256: f69bed24239ec4ebe1b2ce634444fee3227f65eafec41d5efd88893e06f12c8d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://garglob.ru/pbw?utm_term=most+common+words+in+english+language PDF link annotation
    • https://malabukepi.weebly.com/uploads/1/3/0/9/130969546/gejibomobomilif.pdfIn PDF document text
    • https://sazigusejif.weebly.com/uploads/1/3/4/7/134771803/rovodowemigure_jijitojeg_luxojawolirivew.pdfIn PDF document text
    • https://lijowuvum.weebly.com/uploads/1/3/4/6/134624244/mekemisu-rewema.pdfIn PDF document text
    • https://dujedagopodiku.weebly.com/uploads/1/3/4/5/134580966/goditikesaga_nuxaminow.pdfIn PDF document text
    • https://naguruzitu.weebly.com/uploads/1/3/4/3/134369267/70f5cb21ae6feb8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf354e15-6178-4037-9069-20afd5e5347f/msi_990fxa_gaming_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/351196ec-e307-4d5b-9ff0-9eb8e020c76d/questoes_de_concordancia_verbal_e_nominal_para_concursos.pdfIn PDF document text
    • http://kolasotosexu.pbworks.com/f/36041662293.pdfIn PDF document text
    • http://tazijebep.pbworks.com/w/file/fetch/144420324/52528226759.pdfIn PDF document text
    • http://fuvesiwowegu.pbworks.com/f/exercises_on_direct_and_indirect_speech_for_grade_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e93605e5-fb45-4b22-89d9-9913da64c250/teoria_de_conflicto_social.pdfIn PDF document text
    • http://bovojigu.pbworks.com/f/72246202453.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/f/5942055893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee824eab-2d7d-4d8b-9a2f-ce9f8694862c/62005131984.pdfIn PDF document text
    • http://viluxese.pbworks.com/w/file/fetch/144416241/fanala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80680170-f3bc-4077-abda-2432b56b61ca/how_to_use_dash_egg_bite_cooker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9628a6d-ef23-4330-ae96-3d42971251a1/how_to_thank_someone_for_providing_positive_feedback.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2652bf43-261a-42a2-b1a2-50dde203dc3d/is_bounce_tv_on_xfinity.pdfIn PDF document text
    • http://lipadune.pbworks.com/w/file/fetch/144414870/what_is_the_correct_order_to_see_marvel_movies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4240535-70d5-432b-9870-9ab438241f8b/91282209192.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/f/jadajisem.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_off0000e2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F3 5452 bytes
SHA-256: 45a07c8ee4e445e509a50f9f3fb5b65278d78d98bfa1b58cf0fca12215353527
font_01_sfnt_off0000f569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF569 10272 bytes
SHA-256: 8f149885ee9f09be8677e8faaaaa5d72ac3dae813282ef094ec19d673c2c604e