Malicious PDF — malware analysis report

Static analysis result for SHA-256 51f2969ba35b94fe…

MALICIOUS

PDF

68.5 KB Created: 2021-02-22 00:48:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: aa08bf8bbdec29dfcbbba01dce378c33 SHA-1: 842e7d0d1ffda3357ac99e200f5094da4852478f SHA-256: 51f2969ba35b94fe55865355bf2c9a8f77f6aa2232f65316b2b6b122f12f1fa4
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/aws?utm_term=chicken+soup+for+the+soul+stories+to+open+the+heart+and+rekindle+the+spirit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475383/normal_5fd758067b6bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368998/normal_5ff8891eaffed.pdfIn PDF document text
    • http://about-fb-support.com/tudumowytou.pdfIn PDF document text
    • http://all-host.site/nixozexadowpv0vh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450501/normal_600b5e4301463.pdfIn PDF document text
    • http://oneitstore.info/halo_tales_from_slipspace_onlineypt41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401555/normal_60165181c4417.pdfIn PDF document text
    • http://dusosax.66ghz.com/3059402529.pdfIn PDF document text
    • http://japadalifu.22web.org/88497053616.pdfIn PDF document text
    • https://zedodunojoponex.weebly.com/uploads/1/3/6/0/136083391/9577201.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fezenur/solving_trigonometric_equations_worksheet_with_answers.pdfIn PDF document text
    • http://bulofowomogi.epizy.com/xutomurivatipusegujaj.pdfIn PDF document text
    • http://kewupuz.rf.gd/rivonenelug.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/18490137653.pdfIn PDF document text
    • http://fubegamo.epizy.com/kikikukolesep.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_off0000d09a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD09A 5212 bytes
SHA-256: a4accf3f6189d87761c5e9fc8af91360ef68462744e9c1cda62401ea6a0e0637
font_01_sfnt_off0000e24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24B 9940 bytes
SHA-256: 68bfddbd6c6611f4e7d85285176b7a75c87db36735ea17a5e34b760566bf1551