Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4d3880b634edf1…

MALICIOUS

PDF

76.7 KB Created: 2021-06-09 22:34:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ec65e2a6188e752d47dce6582a67cd59 SHA-1: cb25f1f37e91ae29c89368788b9ffa98d43fa813 SHA-256: 9e4d3880b634edf19b0a7a41477b0394892b1ec219a232d4064a257d28e9c952
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URL that redirects to a link farm, a common tactic for distributing malware or phishing content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to obscure the final destination and leverage disposable hosting. While no scripts were directly extracted, the ML classifier strongly suggests malicious intent, likely involving the exploitation of PDF vulnerabilities or the delivery of a secondary payload via the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://inwebjor.ru/pbw?utm_term=vert+shock+week+8+pdf+free+download PDF link annotation
    • https://zanafulifefa.weebly.com/uploads/1/3/4/5/134596365/3aec87a08741c02.pdfIn PDF document text
    • https://jufexowobup.weebly.com/uploads/1/3/4/5/134523708/pibawuxowedux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386837/normal_5fefa85bc9494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497395/normal_60b7e5f04c3c9.pdfIn PDF document text
    • https://wadexusi.weebly.com/uploads/1/3/4/4/134440973/1292897.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403936/normal_5ffbfd073f328.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vosebim.pbworks.com/w/file/fetch/144445281/79146111747.pdfIn PDF document text
    • http://tijigika.pbworks.com/f/captain_tsubasa_ps2_download_pc.pdfIn PDF document text
    • http://fibonilavi.pbworks.com/w/file/fetch/144783312/suwugegedorivifopexubeli.pdfIn PDF document text
    • http://ziduzobif.pbworks.com/f/best_cardio_exercise_for_si_joint_pain.pdfIn PDF document text
    • http://pesumireg.pbworks.com/w/file/fetch/144800670/97651324238.pdfIn PDF document text
    • http://wuvebag.pbworks.com/f/argumentative_essay_tips.pdfIn PDF document text
    • http://nonesupul.pbworks.com/w/file/fetch/144662871/sistema_de_ecuaciones_lineales_con_dos_incognitas_metodo_de_eliminacion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5aaf59e-06c4-4df4-b30b-1191e4692c03/chicken_soup_for_the_soul_puppy_food_ingredients.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4971c5b-f0f8-4291-8f4f-c9fb766a9027/tipajabeb.pdfIn PDF document text
    • http://lulatigono.pbworks.com/w/file/fetch/144543576/luwukuwozeniko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10d09e84-3e7e-4a7c-b578-2f01ac9cfbb7/jegoguwevixavamizut.pdfIn PDF document text
    • http://zusemivak.pbworks.com/f/mijafinadexezopovoginew.pdfIn PDF document text
    • http://gaguseka.pbworks.com/w/file/fetch/144972510/jovufofasajamupasezamo.pdfIn PDF document text
    • http://mapijakemifo.pbworks.com/w/file/fetch/144635931/dejiwa.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_off0000eb45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB45 5560 bytes
SHA-256: a83029429b0034455418c67e0682c729aae4bf69e7fed10f850e636a980a476c
font_01_sfnt_off0000fe45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE45 11832 bytes
SHA-256: 5c1c14365f4c9c93cd80f31ffe4f29a396a81976dcc595e3f918ef5f927399f5

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