Malicious PDF — malware analysis report

Static analysis result for SHA-256 24959b6087caa52f…

MALICIOUS

PDF

75.8 KB Created: 2021-02-21 17:50:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a08e3a13e2677feaf637eda026228874 SHA-1: e19eef1634238c5408a09b5acff6da44ed54f89d SHA-256: 24959b6087caa52f50b55e4e21b89ce632f0fdc2896e60d58f9b75869025abba
126 Risk Score

Malware Insights

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

The PDF contains numerous external URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to phish credentials or deliver a secondary payload. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/aws?utm_term=swann+doorbell+camera+review PDF link annotation
    • http://monongzhlh.space/dejidagabagux261lv.pdfIn PDF document text
    • https://cdn.sqhk.co/ludukuni/ihgihjQ/kuvolakagojosejobetazate.pdfIn PDF document text
    • http://bodyita.space/50704409381foriw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426816/normal_602a33ba852d1.pdfIn PDF document text
    • http://marketeuro.pro/zuwafipumelipijulowewqgkuq.pdfIn PDF document text
    • https://laforefuje.weebly.com/uploads/1/3/5/3/135333455/5048065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414860/normal_60117f78d9b84.pdfIn PDF document text
    • https://jisasulozif.weebly.com/uploads/1/3/4/3/134371627/jinefa_gutagalijum_nesibejev_kukezifubel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479933/normal_5febd3676a26f.pdfIn PDF document text
    • https://cdn.sqhk.co/damukowabij/hfTkJ8h/46001496930.pdfIn PDF document text
    • http://lovemecompletely.com/19169885908t2ru1.pdfIn PDF document text
    • http://urott-hu.com/kirchhoff_s_law_questions_and_answersydw80.pdfIn PDF document text
    • http://laithub.pro/jidenajalotimejupederonamlnat6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465000/normal_5fed10aacd651.pdfIn PDF document text
    • http://profaudit32.ru/breadman_ultimate_bread_machine_tr2200c_manualx5gga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eb49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB49 5300 bytes
SHA-256: 14f7e65efb1ec8f8f7c11d1972953fd55837c5b0090d59f4b0a4a4428f39ba62
font_01_sfnt_off0000fd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD50 10744 bytes
SHA-256: fc99ffe16c297cb89644f6d24ca878183d0c52a6212449708a6f3d7e6ce7435f

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