Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfca16af06d3292e…

MALICIOUS

PDF

67.1 KB Created: 2021-02-02 10:21:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2cb89740f643e2c0e5cd81753e69ed29 SHA-1: 087e4fadea5b5964b03326ca1a59f74120dad3d2 SHA-256: dfca16af06d3292e2e9435da4168ebafaebd4159510870563b4abc67551e54fa
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'https://baarspo.ru/123?utm_term=verb+tense+agreement+worksheets+ks2', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests it is attempting to masquerade as educational content to trick the user into visiting the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/123?utm_term=verb+tense+agreement+worksheets+ks2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473654/normal_6012e9045e949.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482002/normal_5fdc42e1609de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457868/normal_600254d694eec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491686/normal_5ffeaaf5e3cd0.pdfIn PDF document text
    • http://sodamasagu.66ghz.com/dictionary_use_practice_worksheets.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365567/normal_5fcb03f88dfed.pdfIn PDF document text
    • http://iminn.ru/79787163100g8k6v.pdfIn PDF document text
    • http://tukazijib.22web.org/haribo_sour_cherries_nutritional_information.pdfIn PDF document text
    • http://relax35.ru/sap_joint_venture_accounting_booktdv27.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448346/normal_5fe310c5aef05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zovitox.epizy.com/59793623145.pdfIn PDF document text
    • http://legatuwaw.epizy.com/lafopewonevonujofejeg.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/anelastic_deformation_in_solid_polymers.pdfIn PDF document text
    • http://lilufunom.epizy.com/verbal_ability_questions_with_answers.pdfIn PDF document text
    • http://kesufelitam.rf.gd/barbie_doll_pics.pdfIn PDF document text
    • http://bapinusajix.rf.gd/difference_between_alpha_helix_and_beta_sheet.pdfIn PDF document text
    • http://padunogesabe.rf.gd/9717102613.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_off0000c8c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C6 5460 bytes
SHA-256: 5f7c36b136c03dcc362cc7548e87f439fd91bc0c38c60e466f0c85b56587b7f5
font_01_sfnt_off0000db4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4B 10408 bytes
SHA-256: e467b97267953c1061af404bb6e7bf464b62bfae87d7adff82e418de9ea5df64

Open this report in the interactive analyzer, or submit your own file for analysis.