Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3f5f25a2b2077ca…

MALICIOUS

PDF

42.6 KB Created: 2020-11-07 20:36:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 980849794c612fb3d38de70653aea0f5 SHA-1: 9435ba4aff8d9b7bdd5d48cf1843769ea559450d SHA-256: f3f5f25a2b2077cafff051680799eeebcdef883abdc204643edb500b08a68b2d
244 Risk Score

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://soxajenukaru.weebly.com/uploads/1/3/0/8/130874283/xodez-vudivob-gefuzigivoj.pdf.
  • 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://traffine.ru/123?keyword=proxy+voting+guidelines+vanguard+2019 In PDF document text
    • https://soxajenukaru.weebly.com/uploads/1/3/0/8/130874283/xodez-vudivob-gefuzigivoj.pdfIn PDF document text
    • https://warobakun.weebly.com/uploads/1/3/4/4/134486798/43f1faa39.pdfIn PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/musenene_xaberel_morupobi_tumegefif.pdfIn PDF document text
    • https://zopopalolidipe.weebly.com/uploads/1/3/4/5/134500843/zexat-dafemopo-gumilakiveve-litilelajusaga.pdfIn PDF document text
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/bosomil-rudawuwipap.pdfIn PDF document text
    • https://xujiwedebul.weebly.com/uploads/1/3/4/3/134317386/899aa42.pdfIn PDF document text
    • https://wejibuxod.weebly.com/uploads/1/3/0/7/130740202/1db0d258.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/47475284-5fe5-4039-ba4f-72b49966889e/civil_rights_word_scramble_answer_key.pdfIn PDF document text
    • https://kozosimo.files.wordpress.com/2020/11/75255550865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4435448-91d3-4930-9bf3-0ef250dce4c2/importancia_de_la_seguridad_e_higiene.pdfIn PDF document text
    • https://suluximem.files.wordpress.com/2020/11/fefanede.pdfIn PDF document text
    • https://jokusasuf.files.wordpress.com/2020/11/lerugugojedugexosa.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_off000066a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66A9 5704 bytes
SHA-256: f898ec55a7afcfc96712c6dd9d5ecaadfcd01152646a763f80c478278e513ac6
font_01_sfnt_off00007a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A39 10408 bytes
SHA-256: e74796d9b006c13e894b694f51895839d953509881bf1da2c9b303ec7d733214

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