Malicious PDF — malware analysis report

Static analysis result for SHA-256 25158ca0c7ad1d6d…

MALICIOUS

PDF

76.5 KB Created: 2021-05-16 05:30:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8f6d074fb9be50db768226fe1a8881c7 SHA-1: 7bf7217e8594bab1dc482d1c7b4b25c150bf963c SHA-256: 25158ca0c7ad1d6d1fb34096cd5b0001d68aa75eeb1846c85174eee355882fd7
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing attempt. The document contains numerous embedded URLs, with one prominent URL pointing to a page about obtaining a child care director's license in Florida, likely a lure. The presence of external URIs and link farm heuristics suggests the document is designed to redirect users to malicious sites.

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://druttle.ru/strik?utm_term=how+to+get+a+child+care+directors+license+in+florida PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4483604/normal_601f6d8621b91.pdfIn PDF document text
    • https://noserosajegupa.weebly.com/uploads/1/3/1/4/131453720/4247937.pdfIn PDF document text
    • https://towirakupafa.weebly.com/uploads/1/3/4/5/134595516/tejidageti_rusovabazabuluv_kuxetamurililin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483589/normal_600bd0519ecbd.pdfIn PDF document text
    • https://zuverikaniwofu.weebly.com/uploads/1/3/4/1/134108987/gefazoson-buvoso-gafuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_605d94b944dd6.pdfIn PDF document text
    • https://satatemusuk.weebly.com/uploads/1/3/4/3/134311800/fozonamox_mufizeg.pdfIn PDF document text
    • https://mofumamivuzav.weebly.com/uploads/1/3/1/0/131070192/vuxixaburipu.pdfIn PDF document text
    • https://wiwovadale.weebly.com/uploads/1/3/5/3/135322143/e36e90.pdfIn PDF document text
    • https://vofodiwe.weebly.com/uploads/1/3/5/3/135350815/9262500.pdfIn PDF document text
    • https://kuwovuvonix.weebly.com/uploads/1/3/5/9/135971109/9148897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_6013cbf374d53.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370777/normal_5fef6f883cf84.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/nimuwet/pefasejexeto.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/julotuzuxeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acf5fffd-7058-44f1-87ac-41b4dd808c46/48799110122.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dd6145e-643b-4974-96f2-3846fbfab3ee/45522411796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ac1bd77-7975-4a1c-a27b-8a4ba382c012/60544382171.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/57962876004.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/how_to_pair_blueparrott_headset_to_iphone.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_off0000e834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE834 5336 bytes
SHA-256: dce1fdadc7044b259c6a71c188e662563f132bf93cf481f7d50d04cf518656b3
font_01_sfnt_off0000fa65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA65 11808 bytes
SHA-256: b351edd11972945fef3cdc9f019bbc4c6c2ef31aee75636568b660c72e0d0c25

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