Malicious PDF — malware analysis report

Static analysis result for SHA-256 53923f88ee7bf969…

MALICIOUS

PDF

41.6 KB Created: 2020-10-25 09:42:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d05ad46a7b7de161f57e98433a828953 SHA-1: dc05bea5c605b0ba9cd553cc9ddc601320cd7dab SHA-256: 53923f88ee7bf9698bd2b97f9182db100ec0b85853a1b255bc587db4b5c3c5a3
224 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though heavily garbled, contains text suggesting a lure for downloading a manual, which is a common tactic for phishing or malware distribution. The presence of a password-protected archive lure heuristic further supports the idea that this document is a precursor to delivering a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://ttraff.ru/123?keyword=descargar+manual+en+espa%25C3%25B1ol+baofeng+uv-5r In PDF document text
    • https://rixokofumi.weebly.com/uploads/1/3/1/3/131380985/654a2.pdfIn PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/lurasigakaja.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/169792.pdfIn PDF document text
    • https://punadojum.weebly.com/uploads/1/3/2/6/132680976/2816456.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/7d7b6617ab8.pdfIn PDF document text
    • https://gurigibafex.weebly.com/uploads/1/3/0/7/130739571/dobogejawizil.pdfIn PDF document text
    • https://tunimesepet.weebly.com/uploads/1/3/1/4/131455680/xupem-zirixurubomi-nesisejawipagov-fadirunetoweti.pdfIn PDF document text
    • https://fawurefo.weebly.com/uploads/1/3/4/4/134441885/18d06553c225074.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1696278.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/dafuwijitina.pdfIn PDF document text
    • https://tanifovekula.weebly.com/uploads/1/3/1/3/131379991/bd3221dd37929c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371248/normal_5f8d04cc50788.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393639/normal_5f94f64877db5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380413/normal_5f911435a232e.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/a03cc3db-54b8-4743-bbf0-46219cf57af4/badogeligibit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8f38c0e-11b2-44f1-99b7-929e43a75f10/kiwoditalirokejafalusoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9af55db-3170-41f8-808c-674a50957712/51688841424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87c6bd9e-a0ce-4782-a835-970d315a6a5e/dubabuzexuluse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/768c6ebf-2cf1-44de-8f62-8e59bddbfeb8/28823517834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9742/7619/files/fodol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/8745/2078/files/sujujomewado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9682/5764/files/gobizuluvikopuno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2393/9753/files/wovojavatidopawolikute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4082/3706/files/converter_para_jpg_app.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_off00005c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C6A 5904 bytes
SHA-256: fdf2b0eb45e062bf6d372b6a984a55703e3822da9a5b56aaf55555eeff89a23e
font_01_sfnt_off00007046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7046 11636 bytes
SHA-256: 3885b754dd054c6b20dffe53813fdee8d6c5b12da1bf591e612019490e477775

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