Malicious PDF — malware analysis report

Static analysis result for SHA-256 638f704e3098b284…

MALICIOUS

PDF

42.1 KB Created: 2020-11-09 09:01:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 007c9c7bac8f0d7d7ccc75f016adbefd SHA-1: 78e997ab3dfc228ff07aadd90b50646341dcc6bc SHA-256: 638f704e3098b284f4695e9f360d1039e1813dce462cf95311ccbe17d706844d
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=volleyball+lesson+plans+for+elementary In PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/7869d92bca0002.pdfIn PDF document text
    • https://fuxozixer.weebly.com/uploads/1/3/4/6/134694245/7428495.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/wozezozobiguv-wibiwivugijew.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/5174d7.pdfIn PDF document text
    • https://lupolaluxu.weebly.com/uploads/1/3/2/6/132681144/zefox_jewudew_winigejoperugo.pdfIn PDF document text
    • https://jobubati.weebly.com/uploads/1/3/1/4/131453688/wezefesixebiri-korad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412773/normal_5f9d19446debe.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/40e712fe-1b3d-45cc-bb81-148517001779/93766953821.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/83052711358.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/cal_tpa_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff4fe823-d4f7-4323-92fe-fd7e16efc91b/xukizaxiwepodibuvavarotit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caf316e3-f806-45b6-b671-8d2f3dcf228a/29458282097.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_off000065cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CB 5252 bytes
SHA-256: 71121aec411f4d8b2c947644482aa2afb620968748877253afecf00e8e69c5af
font_01_sfnt_off0000779b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x779B 10492 bytes
SHA-256: 06317f24ae7e3b2cf8599acdea709cc5aa80db639723316bf73943bbf4c135c1